PC / Steam Confession -- I only buy a game if it's 75+% off and has Steam Trading Cards. Everything else is Humble Bundles ($1.00) and gifts (thanks!).
PS3 / Console Confession -- I won't play a game if it doesn't have trophies. I skipped out on the first year or two of PS3 games for this fact alone. Mind you, I don't play games [only] for trophies, but I lose all interest when the game doesn't have any. Also noted, pretty much every game released after the first year or two have trophies, so not too relevant. But as an extension of the previous confession... I won't buy a game on PC / Steam if the game is available on consoles and has trophies. Yeah.
3DS / Handheld Confession -- I checked the StreetPass Mii Plaza + Games every day for the first year or so I had the 3DS. Sometimes, twice a day. I pretty much don't bother now, but I only had like maybe two 3DS games for that first year, and didn't start buying any until I lost interest in the StreetPass concepts stuffs things. To stuff in a confession that encompasses pretty much all of the above... I don't like to buy DLC or any download only games or strictly download content. Eventually, I am going to sell or trade these consoles, and not be able to take everything with me. So why bother? Physical or bust (unless it's PC / Steam -- in which case, see above purchasing restrictions). There are other misc factors, but... yeeaaahhhh...
[ And now, for something completely different. ]
If the main character of a game can be renamed, and the player chosen name is never chosen (examples: Shepard from ME, Hawke from DA2), then I always use my real life name. But back in the old days of gaming, ?lol?, if the name slot only allowed four letters, I would use "Mike" or "Alex." I can only think of a couple games that restricted it to THREE letters, but in those rare occasions, I always use "Ace." Does not apply to putting in initials, so... well, initials.