Just a fun thing to do, with the new MP system, you can get a lvl 1 character to lvl 60 in a fraction of the time expected, just a few steps.
Get a low lvl socketed helmet, put in an exp gem you can afford
Get a hellfire ring
Get Cain's set
Optional: leoric's signet
Get a High dps friend, preferably an archon wiz
Now, to level, just put your high dps friend as party leader, get your exp gear on and jack the MP lvl up to 10, and go arreat crater, run through get checkpoint at end, new game, then, arreat crater, etc. and kill diablo at lvl 30, 50
You'll gain usually 2-3 levels per run, up to lvl 51 where you'll gain about 1.5 levels per run. I can sell leveling runs for about 24m (just time lost for me), all gear comes from you though.