Halo is great! It was the first game that I played on the original Xbox. Xbox Live wasn't invented yet. So we had to play LAN games with split screens to have 16 players. Those were the days.
My favorite non-mobile game is Call of Duty. I like to play Team Deathmatch. I've completed a handful of the campaigns, mostly the Modern Warfare games.
That's a hard question for me. I have spent thousands of hours playing many different games. But if I have to guess, Minecraft would be the one that I've spent the most time playing. It's one of my childhood games that I really enjoyed and still do.