Primarily, I play side-scrollers, RPGs and the occasional FPS, 2D fighter or beat 'em up; however, I like most game genres. My early gaming years were spent playing IBM PC adventure games, various Commodore 64 titles, and the flight sims of the 80s-90s. Some of my fondest memories have been on the DOS/Windows PC, playing the King's Quest, Space Quest, and Wing Commander series, but I adore the NES, SNES, and Genesis/Sega CDX as well.
Collecting games is a minor hobby of mine, but I only purchase titles which I have an interest in playing. While many of the older titles I possess are still well-preserved, with their box and included contents, I don't collect for the sake of monetary value or historic preservation, merely pleasure. This being the case, I am perfectly fine with purchasing the occasional title from on-line services such as GOG, PSN or Steam. You will often find me browsing the local used game/DVD shops for hidden treasures.
Generally I am not in favor of DRM, but entirely understand the want of companies to protect their hard work from pirates. (Not that it works much.) As such, I will purchase titles with minor DRM from time to time, but refuse to buy games with over-the-top protection schemes, such as those with the newer "internet connection required to play" titles like Silent Hunter V from Ubisoft. (Unless they have a ready crack available.) I use Steam, but I do wish Valve would remove the DRM from third party titles, as Steam itself is essentially DRM.
I find blind fanboyism and electronic "racism" to be disgusting. While I may not own a 360 or Mac, I know they have many fine qualities. Why let bias towards a system prevent you from enjoying or at least appreciating, the games and subtle nuances of another platform? Do everyone a favor and be a real gamer: Don't let system bias turn you into a jerk, or prevent you from enjoying games. Nobody likes grammar nazis, nitpickers OR elitist fanboys.