Thanks for the reply! - I am certain that it is definitely a challenging thing to do - but don't you see positive results from it, too? I mean, don't you think you are a better manager/maker?
You get to see a more complete picture of projects you work on. You mature a lot as a person, and develop various skills you wouldn't otherwise. It toughens you up, that's for sure.
My main intention was to warn you that it — more often than not — actually means doing more than one job. Both physically and mentally.
I guess the reason I chose to do this is that I get nervous when I'm not in control, and I still like to be in touch with what I set out to do in life; which is to be a good interface designer.
Best of luck to you.