I really don't like feathering. I have tried and tried. It's dumb because a lot of the spaniels would probably fit me, but the feathers dull my zest for them.
I tend to like the flashiest version in breeds. So, if I were more into Border Collies, I would choose a blue or red merle waaaaaaaay before a black and white dog.
In general I like dogs that are chunky in a certain way...Shar Pei, Bull Terriers, Dogue de Bordeaux. Loose lips and/or blocky heads and bodies. Dobermans are the exception but even there, I much prefer the "coarser" look and find that a lot of them look overly refined and weedy to me. I prefer heavy-headed bench labs to field labs based purely on aesthetics, and it makes me feel a little guilty.
I'm totally into beards though. Bearded dogs are adorable, and since I'm already accustomed to drool, might as well accept beards too.
Edit: Thought of another one - I'm that jerk who passes up all-black dogs. Like I said, I like the flashiest versions...I've met fantastic black labs, lab mixes, and pit mixes, but I know if I walked into a shelter, I'd leave with a blue pit or a chocolate lab, nothing solid black or yellow. Horribly shallow of me I know