FAL is by far the easiest semi auto to strip and clean ever. Lots of nice big pieces. Easy to get into.
AK is second. Almost as easy to strip as the FAL. Super easy to clean.
AR is a serious pain the butt. Stupid star chamber. Stupid little cotter pin. Freaking carbon everywhere.
The M96 is easier to clean than the AR as it doesn't get as much carbon in it, and you can pop the barrel off to clean the chamber, however it still uses a pin to hold the bolt in the bolt carrier. I would still rather clean an M96 than an AR.
G3 or Cetme ain't bad, but they ain't exactly fun. Still better than an AR. They get filthy inside, but they work.
The Garand ain't too bad. Pulling it out of the stock isn't so weird once you get used to it.
I hate cleaning. Cleaning is time that could be spent shooting or dry firing. I like rifles that clean up nice and quick, or even better require less cleaning to keep them working. Cleaning at a nice lighted table with soft music and a beverage is great and all, but the real test is cleaning the rifle while sitting on a rock on the side of a mountain just after the sand storm.
None of my weapons look new. All of them look like I use them a lot. When I started out I cleaned religiously. The more I shot, the older that got. Now many of my rifles will go several trips before being given a good cleaning. BLASPHEMY some of you will say. Hey its okay though, I don't own any AR15s anymore!