Put that cookie down now!
I started with Halo 2 at my neighbor's house, purchased Halo 1 PC in 2006-7, learned of Halo 3 and played the Beta, loved Halo 3 until it felt really old (2009-10), I thought ODST was great (just played it this past week), I've played Reach since nearly day 1, and I plan on playing every Halo game until it's somehow ruined.