I love cleaning my pistol. I find it strangely relaxing. I'm really considering getting a WE open bolt PDW mainly because I want to clean it and they're cheap.
As for my AEG, I just clean my inner barrel, I'm too scared to go near the mech box. I just had a bunch of work done to it so I should be good for awhile.
"A Bullet may have your name on it, but a grenade is addressed to whom it may concern."