BB Aus (right) - I like that they have a fairly consistent single Big Brother voice (not at all hours, but at least during the major portions being broadcast) and he's quite a sinister sounding chap. It helps define BB as an actual character and not just a bunch of producers.

BB Aus (wrong) - If anything the show has gotten even more gimmicky with it's twists/manipulation than the UK version.

BB US (right) - It's more honest. It doesn't pretend this myth that the Public Vote versions do that being on a reality show is "an experience" and that you have to lie and pander to the most people to get a victory.

BB US (wrong) - You see the worst in people come out quite clearly, and it can be shocking. While it's a strength that the show is honest about it's intentions, the flip side is that it does get very Darwinian, and it can be quite hard viewing at times.

BB UK non-celeb (right) - Not much. It shows it's age.

BB UK non-celeb (wrong) - A great deal. While it's less overtly viscous than the US show, it's also inherently so much more about pandering and lying to the public, and that being rewarded.

BB UK celeb (right) - Has most of the flaws of the civilian version, but sometimes the mix of celebrities, even those of dubious fame, can lead to some fascinating interactions.

BB UK celeb (wrong) - Like the non-celeb version, perhaps even to a greater degree, it's about positioning and manipulating public perception and making fools of the viewers. That BOTS video with Jim Davidson was actually surprisingly honest about that aspect, for all that they were playing it as a joke.

I'm clearly limiting this to the English language versions on purpose. There's also a Canadian version, but I've seen so little of it I don't feel very qualified to comment on it. I think there's also been a South African version, but if so I haven't seen any of it.

BB Aus (right) - Love the single Big Brother voice, and his personality. Love that they're tough with the rules. Love the nominating process. Love that "jobs" are assigned weekly, and they're made to do them.

BB Aus (wrong) - Put in too many elements from US or UK BB. Eliminated Friday Night Life. House is too large.

BB Can (right) - Um ... nothing.

BB Can (wrong) - Way over-produced. Way too much production intervention makes it all feel scripted. Boring housemates.

BB UK non-celeb (right) - Viewer voting. I like the tasks. Haggle over the shopping creates great friction.

BB UK non-celeb (wrong) - Undeserving, boring housemates win too often. The eviction audience are horrible. All the different Big Brother voices.

BB UK celeb (right) - Usually a good mix of characters.

BB UK celeb (wrong) - Voting is their fame outside the house, rather than what they do in the house. As with non-celeb, undeserving, boring housemates usually win.

BB US (right) - The size of the house; it's quite small. Live feed. The HoH process of nominations, and presence of the veto.

BB US (wrong) - The show is too orchestrated. The diary rooms are scripted. Very little honest revelations from the hms. Too many wanna-be actors. Jury voting rather than voting by the public. The back-stabbing nature of it doesn't lend itself to honest interactions, which are what's interesting about all of them.

There is a Big Brother Africa, which is based in South Africa, in which each contestant comes from a different country. They have a rule that all conversations must be in English. One of the contestants in Big Brother Africa did a swap for a few days with Cameron in BB UK in 2003.

BB Aus
Right: I like their Big Brother voice and how stern they are with their punishments.
Wrong: It's way too family-friendly and sanitized. Not even the daytime repeat of BBUK is this safe. Lack of live feed.

BBUS:
Right - their live feeds are absolutely amazing (4 cameras, rewind feature). I also like their HOH and POV tasks, seems like they put a lot of money into them vs. the silly secret missions of BBUK.
Wrong - a lot. If you think BBUK has misleading editing then you haven't seen anything yet with BBUS. Way too much production interference and they have a knack for casting horrible people. Think 15 Helens in one house. Only 3 episodes a week. It's basically Survivor in a house (although this could be a positive if you like Survivor).

BBUK
Right - I really like the editing of BBUK. It feels more like a "fly-on-the-wall" documentary than a reality show like BBUS. The twists are more exciting and the tasks can be great. I also like that the public has a say with the evictions, like BB Australia.
Wrong - No live feed, too much contact with the outside world. BOTS is crap.

Overall, my fave is by far BBUK and it's the only one I bother to watch these days. I've heard a lot of good things about BB Canada but haven't bothered to watch it. Apparently it's like BBUS with some of BBUK's magic.

BBUK:
Right- I still think BBUK feels the most "real" of the bunch to be. It feels less censored and more true to life than the others.
Wrong- Quite a lot at this stage. The shoe was in a good place for a while, but it seems to have taken some steps back again. Lack of live feed being the obvious one, inconsistent nomination rules, too many "lets show the housemates what they said about eachother / what the public thinks" tasks etc. Production has got very, very messy.

BBUS:
Right- The live feed is brilliant and should be the precedent the others go by. I also love the structure of the game and how ruthless the housemates can get.
Wrong- Nowadays I feel like it's way too formulated. Like if you watch the older seasons there was much more life in it, whereas nowadays it all feels too manufactured. The housemates always say the same thing in the diary room, there's little about personal relationships anymore. Plus Alison Grodner loves her stupid twists and well timed riggage. The last truly enjoyable season for me was quite some time ago.

BBAU:
Right- For me I think the production side of things is spot on. An amazing house, well executed twists, a great nomination process. It just makes ours seem so much more messy and incoherent. The atmospher surrounding the show is nicer as well.
Wrong- It all feels a bit kiddish. Like the housemates always seem to get along, there is really proper tension like ours. I just feel like I don't really get to know the housemates that well like we do on our show.