I am a fan of the bold 1.0mm tip but these pens also come in microtip varieties
  1. Uni-ball Air: feels and writes like an old Flair pen except it's not squishy and it doesn't suck
  2. Uni-ball Vision Elite: delicious and liquidy ink without the smear. Get the blue black ink. It's awesome!
  3. Uni-ball Jetstream: if you like the ball point pen feel and look, this is the pen for you!
  4. That's it, there are no other good pens for lefties. Also, I have no relationship or financial interest with Uni-ball (maybe Lance Armstrong does) although I wish I did.