I've never bee much into 2d fighters; I used to hate them, actually. But recently that's been changing quite a bit.
I tried Blazblue a little while ago and found it quite engaging, which pleasantly surprised me. I've been seriously thinking about buying it. I've also been getting pretty interested in Skullgirls -- I'm a huge fan of the artistic style and character designs.
If you guys had to recommend a title for someone interested in getting more into 2d fighters, what would it be?
BTW, with regard to the 'tier' thing:
Although I can't relate to how it works in fighting games, obviously, this is the exact reason I stopped playing Armored Core games online. It got to the point where you could predict the average ladder player's build. Which is just plain sad in a game like that. So I can relate to the theory, at least, and know from experience how lame it can become.