Classes you prefer to play at lower levels?

[Windwalker]

I play just about everything. In the beginning you can get all jobs to 15 to test them out, focusing on 1 category saves you space in gear too, like for example leveling all tanks 1 - 15 - 15 - 20 - 20 - 25 - 25 - 30 and so on, each time all the jobs hit a certain level you can remove all that gear you just used.

DRG / Nin use seperate gear from everyone else
Sam/Mnk uses the same
MCH/BRD uses the same
Tanks use the same gear trough all jobs.
Healers use the same gear.
and finally casters use the same gear.

I level all jobs, its fun with variety if you get bored of one job you can just switch to another.