I wouldn't call Symantec's products horribly wicked but then again maybe I haven't had your experience with them. Resource hog wise, AVG and Kaspersky are pretty much as bad as they come. After installing Kaspersky on a virtual server and noticing that my virtual CPU was locked at 4.0 ( in top, so 400% load ), I ended up on a conference call for 6+ hours, only to determine that no one had at Kaspersky had any idea what the hell was happening. The solution ended up being that I had to scrap the virtual machine and almost re-image the server, very professional products. As for AVG, well I haven't had any horribly experience with it, resource wise, I've seen it lock many CPU's, never to the point I had to do anything drastic like with Kaspersky but still. If I had my choice I would use Clam AV all the time, it has the best overall resource management. Norton comes in slightly under Clam AV, well Norton has also been observed loading down the CPU, it does it far less and for shorter periods then either AVG or Kaspersky, not the mention the many other crap AV's I've tried.
Sticking around wise, I don't know what you're talking about. I've never had any problem uninstalling Norton, in fact Kaspersky has the worst "stick around" effect out of all the AV's. Kaspersky has been known to install improper registry keys that cause conflicts. Having to dig through the registry to find the keys that shouldn't be there is a pain in my ass and one I shouldn't have to do. Kaspersky is AV software written by children for morons, it will forever be at the bottom of my list for protection software.
As for NOD32 and Malwarebytes, there okay, just have never really used them in the past, Norton hasn't given me any reason to switch and at this rate never will.