I'm not a huge FPS fan, but there have been a few I liked, and DOOM was one of them..
It just seemed to be paced well..
Beyond that, I liked some of the funny ones...
Duke Nukem 3D and Redneck Rampage (Hush Puppies!!)...
Tried a few more, but got bored.. Still pull out those three from time to time..
I did try and enjoyed Prey recently.. Loved the voice acting...
But its a genre that I enjoy a few games from. Unfortunately, everything seems to be that genre now.
I remember I liked Neverwinter Nights, and a friend told me I had to try Oblivian. So I swing by and he shows me, and it's a First Person game!! Aarrgh! (OK, I found out later you can do 3rd person, but I like my RPGs top down.. ;-)
desiv
p.s. You don't know how difficult it was NOT to add "like I like my women" somewhere in that comment above... ;-)