I'm not one to say that I regret buying the games I have, but I gotta say that I'm pretty ashamed on a few of them.
First off, Sims 3... why in the hell did I bought it?, maybe it was for nostalgia, I pretty much enjoyed the first and second Sims, but simply 3 didn't quite "hooked" me like before, I dunno, maybe because I'm no longer a morbid teenager trying to kill my sims in the most ridicule ways possible, including the infamous ladderless pool?.
The first FarCry, I just couldn't stand those fucking mutant monkeys, I never finished the game.
Prince of Persia 2008, too annoyed by the new Prince and I hated how stupid the fights were, I didn't finished it too.
Also, the Crysis games. I so regretted on buying those, many times I thought on giving them to my nephew as a gift, I simply hate them, not because of the graphics, my comp can handle them, not for the gameplay, but for the ending on both games, I felt cheated and I felt like I was having half of the full damned game and no, I'm not interested, at all, in Crysis 2.
Battlefield 2, I can't belive how many people love to walk like 2 miles in 5 minutes only to get shot from affar, or getting runned over by a car, or even better, getting runned over by a helicopter (yeah, that actually happened to me). Also, waiting like 10 minutes to use a damned plane just to crash the next 30 seconds. Not interested, at all, in any Battlefield game and I don't care how many praises it gets and how many 9's and 8's they get, it's simply not my type.
Most recently, yesterday actually, The Oddbox in Steam.
How could anyone resist on buying the whole Oddworld series for $12?, the only draw for me was Stranger's Wrath, but then, I was greeted to a mess of a game that, clearly, isn't even finished, at all, I was very annoyied. Then, Just Add Water, the guys responsible for this attrocity said that the game was rushed for the christmas holiday and that they will eventually patch the game later, even adding the HD models and textures from the PS3 version, BUT they also said that they MAY charge a small fee for this patch... that's just cruel... as somebody else said on the Steam forums, now I know how is it to get coal for christmas. I want my money back.
And last but not least, buying a 360. Long story short, I sold it back, I didn't stand the damned thing and paying up ridiculous amounts of money for something that's not even on par with what a PC can already do, much better and for free. I'm happy with my Wii as my only current gen console.