I've only played Halo 3: ODST but however I've heard Halo Wars is pretty good. Halo: ODST is pretty fun at moments and was actually my first Halo game. I'd recommend that but truly it can get very hard when you're searching for beacons in the city. My advice, get it if you can play co-op; it's extremely hard without an "extra-hand".
Maybe a first-person, but that's going off Halo. Halo is unique with its third-person driving and any thing beyond that is going off Halo. They have this in Halo CEA when you're the passenger in a warthog however, but to me that's a far as it goes.
I don't think you're in the position to speak with the poor profile you had to offer...
Edit: Oh, I see, you're all settled in now, huh? It's a good thing your attitude has changed.