Hehe hey Tarres. If you ask 20 people what they think about a particular track, some will love it, some hate it, while others will say it's ok. The point is there's something for everyone out here, and any track you make will appeal to someone, adding to the incomparable variety this game has to offer.
I will say this: hopefully you walked away from the Expo having learned a few things about track making. First and foremost - take your time. Once you have a basic layout with the texture work complete (or nearly complete...with checkpoints, I might add), drop it in the Beta Room here at MTMG. We'll give it the once over and provide you with feedback. From there you'll make any changes you feel are worthwhile, add more to the track, and repeat the process by allowing us to view your progression, once again providing feedback.
Be prepared to take constructive criticism, however. The goal is to help you produce a quality track that you'll be proud of and MTMers will enjoy playing. It's as simple as that.