I bought my late 2011 MacBook Pro recently, and as a first time Mac user (though I'm a HUGE fan of iPod touch and iPad 2) I'm mostly very happy with it. After playing around with it for a month or so, I thought it would be nice to be able to be able to download using a wifi connection with the display closed. I downloaded a bunch of prefpanes and apps (both online and on the MAS) and they all worked perfectly. However, I eventually decided that I didn't want to risk overheating my display and uninstalled them all. All seemed to go well until I closed the lid. My MacBook Pro simply will not sleep. Sure, I can use
+ Option + Eject and then close the lid, which is what I've been doing for a few days. But I can't seem to get it back to how it should be (with the automatic sleep/hibernate).
I've tried to remove all possible traces of these apps with Onyx, AppCleaner and AppZapper (I re-downloaded all the no-sleep apps I could remember and uninstalled them completely). I've repaired permissions countless times and restarted my MacBook over and over. If you could offer any advice, I'd really appreciate it.

I've tried to remove all possible traces of these apps with Onyx, AppCleaner and AppZapper (I re-downloaded all the no-sleep apps I could remember and uninstalled them completely). I've repaired permissions countless times and restarted my MacBook over and over. If you could offer any advice, I'd really appreciate it.