Posh meal out with some friends, Flight somewhere for him and partner, weekend break, theatre/opera etc tickets, errr
edit: ah just read above. It's for you. Ummm... Give it to charity?! (me
)
Edit2...! On special birthdays I've had weird things that are relevant to my interests but stuff I wouldn't perhaps buy.
i.e. my 21st I got a really old wooden bellows camera. It's not really useable but it looks cool in my room
and I'm in to photography. 18th birthday I got a really nice ltd edition art print.
So... maybe look at antiques and art. What are you in to? Antique globe/telescope, old maps look cool, maybe one thats relevant to a special place you've been, old toys, dinky cars. Just think of cool stuff you can display and remember, rather than some gadget that will be out of date in a year or broken. Especially if you've got everything you need