I did four or five years in telly, and by the end of it was drained. I was a bit sick of myself. I didn't feel like an actor anymore. That sounds silly, but when you're doing a play you're using different muscles, and it blew all the cobwebs away.
I try to be fussy about the parts I play. I think that's quite prudent, it means you're stretching different muscles, and you're scaring yourself by doing something which is out of your comfort zone.