Thank you...it's much easier to show what you are trying to say than to type it out.
Here's a few of the samples I tried - these are not necessarily better than yours - just some different ideas on cropping, some minor tweaks to color or contrast, etc. I think they may add interest to some already very nice photos by cropping for different compositions...and you should have plenty of room with your H5 originals to crop down and still have nice prints.
I worked from your 800x600 posted versions...so obviously my crops are significantly smaller than that and the resolution would look much better when cropped from the originals.
1. Flower - your original post
Crop idea:
You could crop out the upper right area, or the lower right area...try them both. But keeping the flower out of the center makes it feel more dynamic for me, and especially if you framed the shadow of the flower too. I also applied a touch of gaussian blur in the background sand just to imply a bit narrower of a focus.
2. huts - your original post
Here's a case where centering the subject works - rule of thirds can be broken. However, while I like the horizontal centering of the pathway, I don't like the vertical centering of the huts as much. The water is so dynamic, and the pathways are interesting, but the sky doesn't add alot for me. A lower camera angle would have been nice...but you still have a great shot here. I would just crop out some sky - try a 3:2 crop for more width.
crop idea
I touched on the contrast a bit, then a touch of saturation to restore the tropical colors.
3. Hut on water - your original post
Again, here I just think that cropping out some sky and moving the hut off the vertical centerline makes it a bit more interesting. I also deepened the blacks a touch and resaturated a bit.
Crop idea
4. Island - your original post
Here again, the sky could be cropped a bit...and also the contrast felt like it could use a touch of boost. Most cameras in such sunny, bright conditions filled with blues and greens can lose their black level a bit, and end up feeling almost like being viewed through a slightly opaque window. For me, playing with the levels and bringing back some of the depth to the blacks makes it look more lively and vibrant.
Crop idea
Just a few ideas to consider. I really like your photos, and you've got alot of very nice ones posted that are beautifully composed, lit and colored. I think sometimes you tend to default back to centering subjects when not really thinking about it - but clearly you can compose in thirds because you've done it with a few. And again, sometimes centering works - rule of thirds be darned.
Retouching can be awfully personal - what looks good to me may not to someone else. But I've always found that seeing different people's vision of what works for them helps by either revealing improvements to my originals, or strengthening my confidence that my original choice was correct.
Hope these help in either way!
--
Justin
galleries:
http://www.pbase.com/zackiedawg
(I'd be honored and overjoyed to have any of my posted photographs critiqued, commented on, or post-processed - I can attribute everything I know about photography to the wonderful people who have done this for me in the past!) 
