I really like them, especially the 4th one. Try and not get your reflection in the picture. If you have to, get a large piece of poster board of a grey/silver color, cut out the hole for your lens, and shoot through it. This may remove you from the faucet. Nice shooting.
I'm just a beginner at photography and have NO experience with water drop pics like these, but just to throw some suggestions or ideas out at you.... Maybe If you put a plain surface behind the faucet so you didn't see the tap neck thing(i dont think that's the right word but whatever i hope you understand i what im mean...) and/or crop out or the faucet part so you just see the drop. You could even try pointing the camera to the water to get some nice ripple pics.