As long as the game is good I don't really have a preference but I do want some variety. I remember when I started playing action RPGs and all I could think was 'why can't all RPGs be like this.' Now that most of them are like that or like western style RPGs all I think is 'man, they don't make enough turn based RPGs anymore.'
I can't pinpoint my reasoning for why I like turn based RPGs so much but I know I have played Final Fantasy 4 and 6 and Chrono Trigger more times than any other games (not because they have been out the longest either).
Most of all though, I hate that they are taking away world maps. I miss those.