"I wish I'd started earlier," probably something that a lot of genealogists say. By the time I became interested in, and had the time to devote to tracing my Family Tree, most of my older relatives had died. A chance remark by an elderly uncle, reminded me of the story my grandmother told me when I was much younger, about how her mother had drowned when the HMS Albion was launched on the Thames. I started up by following that and it opened up a whole new world.
My greatest regret, as Jane said, is not being able to share my findings with my parents and Grandparents. I often wonder if they knew they originated from Liverpool, Suffolk and Germany and not London as I'd been led to believe.
Enjoy your journey through your family history AT, and, as others have said, get as much information from your family as possible. Don't be left saying, as most of us are, "If only I'd asked."