As a marketing director, I always had to deal with very tight deadlines. I really like Photoshop, but I could always get the same quality in a shorter time-frame with Paint Shop Pro.
Paint Shop Pro X has a free (60 days if I remember right) trial, and is far less expensive than Photoshop.
What most folks will post really comes down to personal preference...kinda like asking everyone what their favor of ice cream is...so try out as many as you can before you decide.
I'm a dedicated "farker" that is to say I like to get in on those fark.com "photoshop" daily contests. The work those folks do is HILARIOUS.
ROX