I started riding at age 50 through the prompting of my sons. Now I am totally addicted and only wish I would have started earlier in life. Having lived in Mongolia for over 20 years, my favorite riding experience is exploring the many mountains of the country for new trails.
Shifter cables. Most of time they just requires a minor adjustment, but it is the one thing that requires the most attention it seems. I imagine the bottom bracket would be more of an issue, but I stay far away from press fit.