Man, there is NO thrill greater than sending out 1,000 or 2,000 letters and having $120,000 come back. Or having a client cut you a check for $12,000 for writing ONE letter.
Or writing your own letter and having the thing just make money hand over fist. You know, just go bonkers.
First time that happened to me, my eyes really bugged.
I realized I'd never have to write copy for anyone other than myself again. Not that there's anything wrong with writing for clients. I loved it and you may want to do it.