I've been using Photoshop since V3, and though the program has grown by leaps and bounds since then (along with the price

), I would agree with Jerry that it's never been my favorite drawing program. I also recently bought PSP8, and given the improvements in this version, Adobe is going to have to go along way to convince me to lay down the big dollars for PhotoShop again.
I agree with Travis on sodipodi, definitely superior vector tools there. But if I really want to draw something new from scratch, and I'm not using CAD, then I still like CorelDraw. They've always had solid vector tools, and their antialiasing is a real treat in my opinion. I confess I usually switch to PS or PSP to finish things up, but for laying down the basic shapes and lines with precise control, I like Corel. Now if I could just learn to be half as good with Corel as mormegil, I'd be a very happy man.