Ok I took a look and they are nice shots but i'm pretty sure you are looking for info to have great shots so here is what I would suggest. One thing that I have been doing is in post processing and it seems to help a lot. I'm not really sure if it is technically correct or not though. Take any of these shots that are shot in bright day light and try this. Add more shadows, and lower the highlights. This will bring out the pop IMHO. Let me know how it goes. good luck