Looks like a few good answers to your question here already. The great thing about the Carpentry trade is that there are quite a few different avenues to go down. Finish carpentry, cabinet making, rough framing, Union and nonunion. the trade has so many different areas and when you find the one you like the most you will enjoy going to work every day.
What i liked best about it when i started was the fact that at the end of the day you could see what you had accomplished. A framed wall of a house, or a nice oak railing installation in a home.
Its a rewarding career in my eyes and something you can have as a skill later in life if your path takes you to a different career.
Best of luck,