Isign gave you good advice and I would seriously take it. It would be a good exercise for you. If you can't find a hundred words to define what you want to do then you'll have just as hard a time in the sign business.
There must be a hundred different directions you can go. Here are two more simple logo's that took about twenty minutes to put together.
Logo design like signs is just another thing you need to learn if you plan on being a well rounded sign shop. The better you get at it, the more you can charge.
Tiki's design is really nice. You should keep on trying to come up with something on your own though. Even if you settle on a logo, you will more than likely change it again in the years ahead. Use that time to practice and learn.