#1 seems like a good shot but as I look over to the right I see how the that side is a bit washed out.
#2 is a good shot from a good angle. Try to use this angle and technique on a more interesting subject.
The two Jamaican pics are just that, pics. There isn't anything really photographic about them. You have encountered cooler looking this than this there right? Plenty of beaches and natural landscape that would make for a good photo not to mention the people. The last photo has a bit more style to it but it is just a memory card on a keyboard. Think about what you're telling the viewer when shooting photos. This one just says, "I know how to use a shallow depth of field", but the subject matter is not sending a message. Sorry to come off too critical but I recommend using your technique in the 3rd photo on something more interesting, perhaps something in Jamaica. Keep shooting!