1. Louis - he is exasperating and reminds me of a bitchy old queen most of the time, but even though he's been using his trademark 'fun-factor' cliche for about 5 years now, the sentiment has never been more true this year. Probably the most honest of the bunch this year as well.
2. Tulisa - small fish in a big pond, but the public love a tryer and she really has been trying hard with her groups. From what I've seen she's the hardest working judge this year. If she returns I hope she brushes up on her musical knowledge a bit, and works on her diction (ballid, anyone

).
3. Kelly - I'm not sure if someone has told her to be completely over the top with the American slang, or if that's something of her own invention, but she can be a bit OTT. I often find her quite arrogant, like she's the only professional surrounded by amateurs. Yes she's been in the biz near on 20 years and has had international success, but she in the UK, on a UK show, with three UK judges. Experience and knowledge is great, but not if you're going to rub everyone's noses in it.
4. Gary - As much as I want to like him, I think I've run out of patience. I still respect the guy as an artist and a songwriter, but as a judge, mentor and a personality? Rubbish. He comes across as more interested in himself and using the show as a promotional platform than he is in his acts, most evidently with Frankie. I think a small part of him thought that Frankie would come to his senses and knuckle down if he made it past the first few tentative weeks, and now can't face the reality that had he'd been sterner with the boy, he probably wouldn't have derailed quite so spectacularly. He'd probably blame the other contestants for not attempting to reign Frankie in during their time with him at the house if he thought he could get away with it.