I have to ask, why did you use ISO 1000, 1/3200 @ f/6.3 on the fist image? I doubt the sun and the sailboat wasn't going that fast...LOL! I think the first one is the best. I might trim off some of the foreground and maybe some off the sky. For you next trip, try shooting around ISO 100 and f/8 - f/11 and set the SS where ever it falls. Use a tripod too.
#2 - I would have tried either getting closer or use your zoom lens to focus on the bottom half of the falls, where it exits into the pool. As it is, it looks too cluttered to me.
#3 - You camera also can shoot in the portrait (vertical) position...LOL! I would crop a lot from the right and left, to focus on the flower and bee.
#4 - Why did you take this one? Just curious.
Hope this helps.