In #1, you've taken the shot with the sun in a difficult position... much of the shot's lighting is low contrast, and lacking in satisfying details. I think the sunglasses could also go - they're a bit too prominent and it's frustrating while deducing what they are. Maybe some flash fill or a reflector would have helped with the subject.
#2: Seems ok, but I think you've angled the camera skywards a bit too much, creating some distortion, and a tendency for the trunks to curve inwards. Also, running through the old "foreground, midground, background interest" checklist, you might have got something in the foreground and got down a bit lower to the ground...?
#3: brilliant colour in the trees on the left! This is the stand-out feature in the shot, and I prefer a crop just above the trees, sun, and building left-of-the-sun with antenna on the right. I'd also correct some of the distortion in post-processing so the building edges are vertical. Nice one.
Cheers, Tony