Something I really hope spills over from XI...Follow

I'm fairly neutral on the idea of using a single character for everything. I like the idea, but I wouldn't miss it too much.

For me I really hope they bring over level capping for content and level sync. FFXI had a lot of good ideas, but these two were something I felt should become staples of MMORPGs. A lot of games have had something similar to the level sync feature, but I always felt they made mistakes. Most of those systems have the lower level player being raised up rather than the higher level player lowered down. A big part of the system is just allowing people of different levels to play together, but another part is for high levels to help out lower levels. If you pump lower levels up, then suddenly they are partying in an unfamiliar high level zone with people using abilities they haven't gotten used to yet.

Being able to do all jobs on one character is very important to me, it is one of the things I loved most about FFXI, no alts, and not having to worry about having a friends list full of the same person, with different names.

As for the level sync, I thought it was implemented fairly well, with only a few issues that needed to be addressed, such as not being able to get skill up's if your skill was already to high for that area, but since we don't know how the mechanics of FFXIV are going to work, that may not be a worry anyway. If they do add level syncing to this game, I would hope as well that it would be to sync down to the lower level, and not sync up.

I want to see both really. The flexability to chose to do everything on one character, or split my jobs between different characters.

Maybe I want a Taru PLD and a Galka WHM?

Flexibility is rarely a bad thing.

Bells without geomancers? HERESY I SAY!!! =P
I agree with one character switching jobs whenever he/she feels like. You can still create alts if you really wanted to play a different race.