Halo controls very well on the console. It provided the best most tuned controls of an fps on a console. Goldeneye/Perfect Dark had good controls, but the Y-axis was very clunky and luckily, it was not used much. Halo most likely did not change much in terms of FPSs in general. Although I wish developers would embrace the idea of matchmaking and parties, that alone is something that Halo can be contributed with. Hell, M$ uses it very deeply in the framework of Live. As far as Halo 2 being laggy, I sure as hell didn't notice.
Also, the shield is what regenerates in Halo 2/3. There is actually a health system below that as well.
Also, vehicles controls are much, much, much better using analog. Probably due to the fact that they are analog.










