1. 27
2. Absolutely, having a great time with it. 5 right now (little early since its only been out two days, but hey)!
3. Yes both the Alpha and Beta were a ton of fun!
4. Yep, definitely am. Have two friends that I have played exclusively with so far, and have several other friends also playing.
5. Love is too strong of a word for Halo. They are fun, I bought 1, 3, Reach and 4 (I never owned an original xbox so 1 was on PC). Probably wouldn't have got any of them (besides 1) if it weren't for friends also getting it. Had fun times playing it with them though.
6. Not sure about love, but they are great games. I enjoyed 1 and 2 a lot and played both a ton with friends. The loot system in that game got old though, finding upgrades once you max out was a really rare occurrence. That being said I know I am skipping the prequel or whatever its called that is coming out next.
7. Yes I do love the Diablo franchise. I remember getting Diablo 1 back in some collection with starcraft and warcraft 2 (WC2 is what I originally got it for, but then I discovered how awesome the other two games are as well) and playing it a lot. Got a friend and my Dad into it and would play it with them. Diablo 2 took up the vast majority of my free time once it came out haha. Such a fun/great game. I couldn't even begin to estimate the hours I played that game. Diablo 3 is also a fun game... didn't live up to the initial hype but with RoS and the changes they have made I do enjoy the game a lot now.
8. Yes, L4D and L4D2 are a blast. Definitely a great coop experience. Haven't delved into competitive much but from what I have played I know I would enjoy it if I had enough friends who played it to fill a team.
9. I definitely enjoy competitive gaming. Recently I played a bunch of TLOU multiplayer, I like Dota 2 (even though I'm only ok at best), some Titanfall when it came out, etc. I know I will play Crucible a good amount in Destiny. Multiplayer for me though is all about having fun with friends, so given a choice between coop or competitive I would choose competitive every time. Games where you can be tactical and work together as a group are my favorite kinds of multiplayer (ex: Dota 2, TLOU, Mass Effect 3).
10. RPG's are my favorite genre so I definitely love strong singleplayer campaigns but they have a place. Not all games need or should have that.