Halo 3 plays so much better than Reach it's ridiculous. Gun play is much better, run speed is quicker, and jumping is higher. It makes the game feel so much smoother and flows better. Plus it's great being able to use a turret and not have to constantly worry about it over heating. I really hope Halo 4 is more Halo 3 and less Reach. It's just too bad the maps in Halo 3 suck so much or I'd be playing it more often (not that Reach's are much better).