Nice pictures, love the color in them. My ISO Speed was 200. I'd normally say I somehow didn't set the color/lighting right in PSE but it's still visible in the unmodified images too:
I don't think it's the scanner either, because I ran some more through it as a test and those came out fine. Thus I'm leaning towards just low quality film; I typically shoot cheap bulk film, in this case Fuji, through cameras that I'm just testing, but I've never had the grain show up like that.