I'm of the opinion that rolling stats should only be done if you have a chatroom setting where the DM can see your rolls or he rolls for you. If you roll a 14, 14, 14, 12, 10, 10, you could just as easily say "I rolled an 18, 16, 15, 13, 13, 9".
There are also too many ways to do rolling that change based on DM preferences. There's the "roll 3d6, take what you get.", the "roll 4d6, drop lowest", "roll 2 sets of 3d6, take the better number", etc.
There's also DMs that prefer point buy, either where higher stats start to cost more than one point, or every stat point costs equal points.
There's also the array method where everyone gets the exact same stats and they have to rearrange how you want them.
Both of the last two can be done without DM presence, but rolling should be done where the DM can see unless he has enough faith that someone won't make their stats better than they could be. And god forbid they actually do roll an "18, 18, 18, 18, 18, 18". Who'd believe it?
Unless a DM has stated the ability generation method, I say hold your horses on making your character sheet. Unless you're using a program to do the math for you, there's a very good chance that when you have to reroll/regenerate/reorganize your stats that you'll miss an effect it has on skills, hp, armor class, saves, carrying capacity, whatever.
EDIT: Also, there are other things to wait on a DM for. Does he want to start at level 1? Is it core only or splatbooks allowed? what splatbooks if any? How do you handle hp/level? roll it, roll twice select best, average, something else? do you use standard gold for level or want something specific? are there houserules on what's allowed or not? houserules for something getting modified?
Example of a post a Dungeon Master would make:
Code:
Okay, so I want you guys to make a character at level 7. Since a few of you are new to the game, I'm going to ask for core stuff only, though ask me if you really want something from a splatbook, I'll think about it. I know Mike wants to do a cloistered cleric, and I think that's okay.
Roll four 6-sided dice, six times. For each time you roll, drop the lowest roll and add the other three dice totals. The six results will be your ability scores.
For gold, you can use the standard gold for level 7, I believe it's XXX,XXX gp.
This is a low magic environment we're going to have, so don't buy anything higher level than a minor woundrous item (so no more than XX,XXX gp per item).
Please have character sheets posted by this date, 'kay guys?
See? Lots of important info.