I love the left and right half screen snaps, but the top of the screen maximize snap is just annoying. Is there anyway to selectively disable that one?
Related question: Is there any way to customize the Windows 7 snap feature?
You cannot, Dan.
I do agree however that the "maximize" snap has got in the way a few times with my usual window dragging and such operations.
I can't seem to be able to locate it right now (which is a shame, since I would like to provide you with the link). But the "maximize" Aero-Snap feature has already been criticized by more than a handful of users across TechNet and MSDN forums. It's very likely Microsoft will introduce changes to this. At best allow for selective Aero-Snap features, which is something that has also been asked for other reasons.
EDIT: For Clarity; As already mentioned, it is not possible to do exactly as you asked; to disable all features, you can take the following steps. Sometimes I find myself more annoyed by the "helper" that I don't want than enchanted by those I do. As such, here are instructions to disable the whole she-bang.
Prevent windows from being automatically arranged when moved to the edge of the screen
Note, there seems to be some debate as to whether the hotkeys such as
[WIN]+[DN] still work, and I am not running Windows 7 at the moment, so if you could post in reply as to whether or not they remain functional after disabling this feature, I/we would be very much obliged.