Been answered by other posters, really but *adds tuppence*

Chelsee and Pasha

+ves
1. Good at latin and ballroom (most important thing)
2. A partner who choreographs recognisable dances with a lot of content, who she happens to have a lovely chemistry with
3. Musicality and the ability to sell a dance

-ves
1. Marmite personality
2. Can make errors when excited or nervous
3. Has a plentiful bust that the wardrobe department have only recently gotten around to dealing with!

Harry and Aliona

+ves
1. Excellent in ballroom
2. Clean and has barely put a foot wrong
3. Handsome chap

-ves
1. His execution is great, but I don't think he has any involvement with dancing beyond that.
2. Not a natural performer
3. A lot of people dislike Aliona, which is unfortunate

Jason and Kristina

+ves
1. Kristina
2. He puts in the hours
3. He's a polished performer

-ves
1. Poor chemistry between the two
2. Started off too good, hasn't been on a j******
3. Never seems to let go and have fun on ITT, in the Tessanine etc.