There are some factors of the XBox360 and the PS3.
PS3 gives you a free PSN account and the PS3 is great for RPG, Adventure, and etc. It also gives you the better graphics than XBox 360 and not many 10 year olds infest it.
XBox 360 requires you to buy an XBox LIVE account but gives you a wide array of games like shooting and etc. The downsides are the slight worse graphics than PS3 and the large infestation of 10 year olds on major games such as COD series.
I'd prefer PS3.
Graphics arn't the ultimate static that define how good a game is, i'm finding it hard to comprehend how people put aside stuff like gameplay and story just over a little eye-candy. Secondly i could guarantee the community on PS3 isn't anymore mature than Xbox. Although don't really see the community as a downside most of the time when there's a mute button.