Well, then, that's all the fruits listed in Galatians. Even a cursory reading of the Bible will show there are other fruits. Though I like Shawn's reminder that the singular is used - they're many, yet they're one. I couldn't help but notice how many times there was overlap.
What's also important is that they all come from a heart that wants to serve Christ. (Fruit of the Spirit, after all.) They're also often positive commands - that is, they demand more from us then simply denouncing sin and thanking God we are not as other men. As Christians, we need to do something, not just be against something.
The next portion of Galatians urges us to walk in the Spirit. (5:25) The Christian must be a doer of the word, and not just a hearer. (James 1:22-25) His faith will necessarily bring forth fruits - maybe not as much as some others (Matt. 13:23), but it will still be evident. (This is a good reminder that not all Christians are at the same place in life, and to be patient with those who have little and work to disciple them, and to be thankful and respectful to those who have been given more.) And it keeps pride in check, too. The man who thinks he's all that, who's convinced himself that he's good and everybody else is terrible is told that he's really nothing. (6:3)
Again, this is all Spirit-driven through the work of Christ on the cross. If we do well, well, we're still unprofitable servants. (Luke 17:10) The glory goes to Christ alone. Now, if Christ was willing to die for us - folks who certainly did not deserve it - oughtn't we be willing to work a little bit to bring forth fruit and thus bring Him glory?

