Man, I feel like I haven't even finished the first one thoroughly! I mean, I completed the first and second playthrough with Mordecai, I finished Knoxx on both PTs, but I haven't done Zombie or Robolution on my second PT yet. I haven't even touched other characters.
I feel like if I buy BL2 right now, I'll never get around to doing the things I didn't do in the first. I like to get the most out of a game
I mean, if the second is almost identical in gameplay, but with improvements, it's hard to play the old one. Sometimes games in a series change radically in the next game. This just seems like an upgrade, but the basic game will feel the same, thus I will never want to play the first again. Dilemma!