I'm a big fan of Halo 2. It was my introduction to the Haloverse, and so there's definitely some nostalgia involved with that.
Weapons-wise, I think 2 and 4 have some really neat weapons. I tend to use SMGs or the sniper rifles, but to me, the Scarab has one of the most unique designs in the series.
Story-wise, Reach still gets to me. I just finished replaying it and it left me with all the same "what-if" questions that it did the first time I played it. I won't post them here in case there's someone reading this that doesn't want spoilers, but it's a great story.
Weapons-wise, I think 2 and 4 have some really neat weapons. I tend to use SMGs or the sniper rifles, but to me, the Scarab has one of the most unique designs in the series.
Story-wise, Reach still gets to me. I just finished replaying it and it left me with all the same "what-if" questions that it did the first time I played it. I won't post them here in case there's someone reading this that doesn't want spoilers, but it's a great story.