So far, My favorite is my leather, 3 cigar holder(that is embossed with harley davidson) and came with a cutter that fits in a pocket on the holder, the cutter also is engraved with harley davidson.

 

My wife bought me a pair of boots and my son bought me a new drive belt.
Other than the shirts from dealership of towns I visit, I don't have any Harley badged crap.
I like to spend any extra money on my other two pleasures, my wife and boat.

 

T-shirts, boxer shorts, hats, a clock that has pictures of different Harley models that start their engines every hour, calenders, a silver bracelet that I gave to my gal, playing cards, a Harley plate and bowl set with cup for my infant son - and I'm sure some other things I can't remember. Some of the t-shirts my in-laws got me from their travels around the country were pretty cool. I've been riding H-D's since 1972.

 

Mostly parts from JPcycles, gave the wife a list of parts I needed. Can't walk into a dealership and buy parts for an Ironhead.

 

Chirstmas, birthday, Father's Day -- I always get at least one T-shirt/coffee mug/knick-knack from some friend or family member. I will only buy a shirt if it's a really unique and artful design, or from a dealer that has some special attraction for me -- like H-D Shanghai(!)

Most useful (to me) gift of that sort I've received is probably a pocket knife.

My wife (who doesn't ride at all) loves to shop at dealers, has me stop when we're travelling "just to see what they have." She buys H-D Christmas ornaments every year, too -- she even puts a small motorcycle-themed Christmas tree in my office (despite my objections!)