I don't like that there's a sign in every picture. Needs to be more generic if you ask me. Sure, it can be a recognizable building...but you don't need the sign in front of it to tell you that...it's kind of distracting. Also, the selective colouring works in neither of the photos you did. sorry... 3 and 4 are my favourite...but 4 would be much better without the sign in the way.
IMO, selective coloring is overdone and not appropriate for many images. Sorry, but I don't think it works here. Number 5 could be nice, but the added grain is too heavy in my opinion. I also think it could use more contrast. Remember, opinions are like a certain body part, everyone has one. Mine is no better or worse than the next.