What is your personal favourite halo game? Mine is Halo CEA.
Absolutely hated the flood, so that takes CE, 2 and three out. I haven't finished ODST yet... I like the story behind 4 and love the graphics of 5. But for me, I think Reach has the best of everything. The graphics (for the time) were great, I loved the campaign and (for a time) the MP was pretty good (I still love FF but a lot of times the other players make it semi unbearable) and I love the story behind the campaign. So my vote it Reach!!
Halo 3 and 4 are not only my favorite games, but also the favorite games ever among all the games. Despite the games that were released before 2015 are not fun to play anymore for me, Halo 3 and 4 never gets old. Still whenever I hear the music I remember the sweet times playing Halo 3 in my mother's flat in Greece with my brother and go outside for a Nerf battle.