My husband is a beer drinker, he likes exotic beers so for Christmas we got him Beers from Around the World from World Market. They also had a Winter Beer collection and this summer they had a Summer Brews collection.
We have also gotten him ties with Superman and other fun themes.
Superman car decals and seat covers
Father's Day we bought him (or he bought himself) a boat, so we got the softside garage from Tractor Supply Co so he can store his new toy. $380, expensive
Guitar books from Barnes and Noble, plus picks and a kapo
Guitar lessons from the local guitar shop he likes.
My uncle collected walking sticks, now my son does
My dad a "calculus is fun" tshirt, any math related or trivia book