I always like to have at least one stat that is very low. I think it makes the characters more interesting. Sometimes I even pick a stat that is actually pretty useful, like Constitution, just to handicap myself a little bit, for the challenge and for the character concept. I mean, I don't make Rogues with 8 Dex, or Clerics with 8 Wis, but sometimes I will dump a stat of secondary usefulness, even if that's going to detriment me.
Yeah, I use constitution as a dump stat quite a lot... especially if I'm playing a ranged character. Since I love making ranged rogues, str, con and wis can all become pretty dumpy. Also love making the big dumb half-orc fighter build which pretty much makes everything but str and con a dump stat.
