What PC game(s) to buy?

[hot_pastrami]

Until recently, I pretty much had to forego computer gaming due to two factors:

1) Lack of time due to wedding planning, selling my old house, fixing the new house, etc.

2) Lack of money due to two mortgage payments, home improvement costs, and saving money for honeymoon.

Well, I'm now married, back from the honeymoon, and my old house is sold. The new house still needs some work, but most of the expensive stuff is done. So I find myself with a little extra time and money, and I thought I'd start gaming a little bit again. But a lot of PC games have come out in the past year or so, and I don't know which ones are worth playing.

I host LAN games occasionally, but most of my gaming will be single-player. I'm looking for first-person shooters and similar, particularly those with a strong storyline and involving gameplay. I got burned out on Real-time Strategy games.

Single-player games I've enjoyed:

Deus Ex
Rainbow Six (and all addons)
Rogue Spear (and all addons)
Hidden and Dangerous
Half-life
Medal of Honor: Allied Assault
GTA3 and GTA:Vice City
Max Payne
Mafia
Soldier of Fortune and SOF2

Games I'm looking forward to in the near future (lots of sequels):

Deus Ex 2
Half-life 2
Hidden and Dangerous 2
Max Payne 2
Doom 3
Halo
Duke Nukem Forever (cough)

Games I was disappointed by:

Ghost Recon
Return to Castle Wolfenstein
SWAT 3

...any suggestions for games (or add-ons to my existing games) to try? I've been reading some game reviews, but damn there's a lot to sift through. The new Clancy-based games look like they might be fun... any impressions?

Thanks!