I'd like it without the flag all together, if the flag isnt black then i dont dig but that's my own little thing. I see what invisible was saying about the sky, while on the left it's a bit detailed but the rest is a lot more flat, I don't think it detracts too much but it does a little to me due to the top left of the building standing out a lot less.
I like this a lot overall, but I would like to see either less clouds, or more clouds (probably more).