You have to be willing to come up with a hypothesis based on less than complete data. Unlike, say, chemistry, we can't easily conduct our research in the lab. We have to see what is there and use our best scientific reasoning to decipher the connections and relations that make the earth work. We like exploration, and some of us are less comfortable with mathematics and quantitative reasoning than, say, physicists. The natural history side of the story appeals to us.
Geologists tend to be easy going.
We're dealing with thing that don't happen fast and with problems that take a long time to solve. A geological puzzle can't be solved in two to three weeks. Being a geologist means relying on everything you know, all you've learned, to construct an answer. Consequently, you can't ever know if you have the right answer. Geologists will never say they're right, knowing that someone else may come along and have a different piece of knowledge and therefore a better answer.