good effort on all of these, you want C7C so here it is.
1. I would have possiblty chosen a different angle so the wall and the tree wasn't visable in the frame, also for me water always needs the fuzz, thats just mee though, so tripod and get that shutter down to 1/10s, but looking at the shadow it may not have been possible with out a 10 stop filter.
2.not sure what youy were trying to achieve with this shot, is it a shot of the pony? or the building or both?
3. really like this, my only bug with this is the deffanition i can make out in the shadow, siloutted need to be the blackest of black.
Overall great effort, look forward to seeing more from you.