I like the composition of the first one the best. Don't care for the second, especially the over-exposed sky on the bottom left. I like the Sunflower photo, but I'm not sure about the foreground leaf.
first one is the winner in this set. great combo of colors in the flowers and background. the reflection on the table is very nice and also the low horizon works well. great composition on 1:thumbup: 2 doesn't work because the eye is drawn to to overexposed area in bottom left. i agree that your name on the bottom is too large, it distracts from the image
I also agree about the watermark. Personally, I like the 3rd best. Looks like the onboard flash was used on the first 2 to me.