#3
The rhythm is pretty interesting...perhaps too interesting if you know what I mean. One of the things you have to remember in composition though, is not to use devices just for the sake of using them. I'm not saying you shouldn't experiment with new devices; just don't make a device the purpose of the song, as that usually seems very gimmicky. Devices are meant to enhance songs, not the other way around. There are a lot of very effective ways to use tritones, for tension and release phrases most of the time, but just throwing them into a song and saying "look everyone, tritones!" isn't one of them.
However, if you take the focus off of using tritones, you could make a pretty cool song out of this.