Just found out I'm getting Diablo 3 in a week or two as an early Father's Day present. I will have limited amounts of time to play (about 30 minutes around 7am EDT) during the week, and little to no time on the weekends. None of my friends are likely to be available then (plus they like longer play sessions).
If all I'm interested in is gaining EXP and loot as quickly as possible, is it more efficient to go it alone as a wizard, or should I be joining a public game for whatever quest I happen to be on? I'm not sure how the lack of coordination / play skill of the random Public players will balance against the 75% HP increase on the monsters.
Do these considerations change in Nightmare / Hell? Just going to leave Inferno out. What about with a different class?