personally think Borderlands is one of the best games ive ever played lol
mine are warhammer online and aion, i swore i wouldnt buy another MMO on launch but then i played star wars![]()
Dragon Age 2 - I hate to jump on the hater bandwagon but it's just so bad compared to the first.
Empire Total War - way to kill a great gaming series.
Wasted a lot of money on steam sales - too many to name, it's more of a collective regret because each game was only like £2.
Civilization 5 - I've gone back to Civ 1 on dosbox, which I honestly get more enjoyment out of playing. Only had 2 goes through Civ 5 - it's just so slow to go through a campaign.
MW2 Got less than ten hours out of it before the relentless amount of cheaters online made me give up.
Spore.
It thought it was gonna be a game that required a bit of strategy to do well in but it was just rubbish all round.
Empire Total War.
Got it on release day for my birthday and never really got into it. It's a decent enough game but poorly supported by the developer and I felt cheated when they repackaged bits of it as Napolean instead of fixing Empire.
It's really put me off Total War games
Moral of the story is avoid pre-order, wait until it's been out a month or two and you can read all the bad reviews people give a game.

Those are my biggest regrets as well.
After the massive wait for spore, and seeing those videos from development a few years before it was lunched, I could barely contain my excitement when it was finally launched - 'if it looked like that years ago, it must be amazing by now!'. So pre-ordered it, and felt completely cheated. I think I restarted a freelancer game only a couple of days after getting spore.
I can never forgive ETW for the horrendous bugs. Slightly more scope than M2TW, but it was just harder to manage a big empire with having to click on all the individual farms to upgrade them etc. As far as I remember the campaign map AI was also pretty awful. Alas I let my inner TW fanboy out and had the special forces version pre-ordered (In a physical format, of course that didn't stop steam messing round for hours trying to download the whole thing over my 100Kb/s connection every time I put the disc in...). All in all 2 big wastes of money. - Moral of the story is avoid pre-order, wait until it's been out a month or two and you can read all the bad reviews people give a game.