Good job getting through a grow and having a smooth smoking bud!
Not to jump on the bandwagon, but adding the information that people above have asked about would help. So would any pictures that you might have. And even then, it might be hard to pin down exactly what the issue was beyond generalizations. It really could be anything from lighting to nutrients to genetics or anything in between.
This is a great place to get help, especially as you're going along so that you can give information about your environment, etc. and provide pictures in real time. I certainly hope that you grow again and if you have any questions as you go along, check out GWE website, take a look at the Plant Problems page that Nebula has on GWE, and if you're still stumped, post your questions here! There's surely someone here who's had the same problem and can help out or at least make some suggestions!
Happy growing!