i'd say horses is his most "civilized" novel, if you found it disturbing, you probably wouldn't want to read his others. i love mccarthy's work, but i do realize it isn't for everybody.
it's strange, but tho Blood Meridian is a very brutal and non-forgiving story, i find it very exhilerating, others have told me it depressed them, but it's never affected me that way. but i am subject to hate brutal fiction, i was badly disturbed by american psycho, years ago, and there have been others. but something in BM really exalts me, i think it's simply the incredible granduer of the prose.