Yeah I was speaking mainly for console based first person shooters. In my opinion there isn't a FPS franchise on a console that compares to the impact that Halo has had over the past 10 years. I should have clarified that. If you bring CS and Half-Life into the picture then it's a bit of a different story (I admit to not playing much of Half-Life though). Counterstrike was absolutely huge for online multiplayer. I do tend to split up those two fields (console/PC) because it's a different gaming experience to me.
Just to clear something up, by no means am I a Halo fanboy. I didn't even buy Halo Wars or ODST because those games were total cash crops put out with a Halo name to make money. I do think that you missed out on Halo 2 though. Hands down my favorite and most played game online, which made up for the games less than stellar campaign (compared to Halo 1). In my opinion that was the peak of franchise because it was so user-friendly. Online stat tracking, pre/post game lobbies after games, clans/clan matches, a unforgiving leveling system, 4 map packs, friends list tab that opened by the hit of one button (the inspiration for the 360's current interface/guide button). I could go on and on but I'm sure you could as well if you were to pick out your favorite shooter franchise and analyze it.
In regards to my question, I wanted to know what console shooter franchise you'd put ahead Halo. Personally I hated the COD franchise until they moved onto Modern Warfare and the Battlefield games I've never been a fan of for their control scheme and overall gameplay. Those always seem to be the games that people debate with me about being better than Halo.
Also, I do think that Bungie is truly done with Halo for now. That all depends though on how well their next franchise does though. If it bombs then I'd expect them to go back to their roots. On the other hand I think that's highly unlikely as long as they flash that Bungie logo before the start of their title. Fanboys will be sure to go out and buy it.