If you don't have the need or desire for anything fancy, here are some of my favorite inexpensive wall hooks.
$12 set of 4
these get hammered directly into your wall. while they cannot hold too much weight (depending on what kind of wall you have) they're pretty cool. i love how they look in my bathroom.
2 1/2"W x 2"H x 1 1/16"D
this style hook can be found in almost any hardware store.
also comes in red
5 1/2"L x 4"W x 3 1/2"D
curved top is perfect for coats with a hook underneath for bags, umbrella, etc.
(nickel plated option)
1 1/2" or 2 3/4"H
these come in small and large sizes. i have them in my coat closet
1"W x 4"H
flips over to fit 2 sized doors
this style hook can be found in almost any hardware store. I have them on my front door.