TNO was awesome, but certainly a bit more sofisticated than Doom. It was very reminiscent of HL1 era games, solid shooter with some interesting twists to keep it interesting and enough secrets to keep you searching. Old blood was decidedly B material, but still good enough to entertain me all the way through.
Doom was a bit different, but I'd still rate it as a must play game if you are into shooters.
It's interesting how all these games played well as corridor shooters, but offered enough depth to make scavenging rewarding.
I'm a bit afraid they will go more crysis in this one, judging by the suit from the trailer, but hopefully it will work out.