I'm seriously considering it; I've only ever been in 1 world (Rockne), but have been around for 12 years.
But this brings up (again) a new hate-fetish: the dumbing-down of D3. I really don't want to spin my wheels (and pay for the pleasure) for a whole season at a D3 school, not even being able to pull levers and push buttons so that I enjoy it a little more.
I've mentioned this idea before in other threads, but I wish they could detach D3 from all worlds and just a have world or two for D3 players to stay in, and for new GD players to start with. If you want to leave D3, then you can take your resume to a D2 team in any other world. For an owner who has been around forever like me, you should get a free "Pass D3 and go straight D2 in the world of your choice" option.
Grumble. Hate-fetish rant concluded.