I'm, somewhat unexpectedly, using the Alice Tarot for working on my novel at the moment and have been really pleased at how clear it's been. For readings for others I tend to use my PCS Centenary.
It's a little bit older but I'm working with the "Joie De Vivre Tarot" by Paulina Cassidy. I was in a bad spot and figured a deck that shows you how to find joy in life wouldn't hurt. It's a very sweet, positive deck that actually IS helping.