I choose jpegs every time. I've never yet seen one lose quality. But then, I stay in PSD until I'm finished working on the project. And for any kind of print work you always want to save in PSD so you can access not only the layers but the RGB layers. I really don't care for tiffs at all. Just a quirk. To me, tiffs are exclusively for line art.

Talent is God's gift to you. Using it is your gift to God.