lol, I see where you are coming from, when I first saw them, I thought they looked sorta scary (lol). But after you realize that they usually do funny stuff on stage, its all right. For example, On SOAD's live in the lowlands concert, they had an onstage technical error with the guitar and Serj started kicking it saying, "bad guitar bad". It was really funny.
All SOAD concerts are funny in some way, lowlands 01 , bdo 02 , kroq 05 , leeds 01 , reading 01 , and all !!
Suite Pee is awesome, I agree with most of your favs from the self titled but I don't like Sugar so much. Toxicity, I agree completely, those songs are immense. Steal This Album is my favourite and I think you missed many of the greats of your list. NUGUNS, A.D.D, Pictures, Highwsay Song, Thetawaves, Roulette. MEZ I don't really like, though my favs are TCMMFLIOTS, violent porn and Lost in hollywood. HYP was pretty bad I thought, my favs are Vicinity of Obscenity and Holy Mountains.
Yes, Suite Pee is crazy, I love the harmonic part at the beginning , I don't like the reason behind the song (cuz its against my Religion) but the song sounds so cool that I just have to like it. If you go to http://www.systemofadownonline.com/ , they have all of the song meaning there, I find them really helpful.