Another challenge I didn't vote in, but I do like this very much. Grain/noise is a hit or miss thing I think. It either works for some or it doesn't. Personally, I like it, it adds a nice vintage touch. I also think you nailed the exposure (whether in camera or post) as it certainly looks like pre-twilight colour and light to me. Very nice work on this one :)
Nice composition and color in sky. There's a lot of grain in the sky, consider using a tripod, lower ISO, and noise reduction software. Also consider dodge and burn, etc., with advanced editing.