In my opinion Reach was a fail just because bungie was forced to make it.
Now I for one will be playing Halo 4 for a while and I will be going back to Halo 3 like I still do now.
My question is what game will you guys go play more Reach or Halo 3?
I will point out one thing Reach is one of the easiest Halo games out there.
I’m a bit divided right now. I played 3 for a while a year ago and that’s what got me into multiplayer gaming and I became a pretty decent player until I tried my hand at reach
For some reason I started playing Reach more and pretty much forgot about 3
Just recently I went back to 3 and I have to say, even though I sucked 'cause I hadn’t played for ages, I liked it so much better than reach I felt like I’d been away from home for too long. I’ll be spending some time playing it again just before 4 comes out 
Well…I’ll be playing Reach more than 3 because I only currently have CEA and Reach, so to have HALO 4.
After i get halo 4, i won’t even think in other halos. But halo reach would be my first choice, i really enjoyed it.
If I decide to play something besides Halo 4, it will be Reach. But to be honest after every new Halo release, I never look back to the old one, so it might be none of the above.
None, after Halo 4 I will only play Halo 4.