I am with Klue on this one- I loooove color and I agree that all colors match if you mix them right.
I love scrappy quilts, so they usually have every color in the rainbow in them by the time I'm done. Why make a two color quilt when you can have 40 or 50 in there? LOL!
A lot of the quilts I make are gifts, though, so I try to match them to the giftee's house or something I know they like. If it's a wedding gift, I will use the wedding colors. I try to make it personal.