Power
You'll be designing projects for clients, so you'll have to kowtow to what they want to a certain extent (or rather, a large extent). They can (and will) fire you in a heartbeat. But of course, if your buildings are just fab and your skills become highly desired, you'll have more say and will be able to throw your weight around a little more. Just don't knock into any support beams.
In general, though, architects are artists and, as such, have little power while they are living.