I live in a very rural area, so there's plenty of roads to ride around here that aren't too busy (especially early on a Sunday morning) and some back roads through wooded areas.
In the summer time, I get out early in the morning before dawn to beat the heat. Yes, I have plenty of lights; if someone hits me, they're going to have a Really Hard Time explaining to the judge how it was they couldn't see me.
Last year I rather unexpectedly came to own a mountain bike. This is something I always thought I'd enjoy but didn't pursue because the decent trails are about an hour from here and my time had been very tight. With the time constraints eased, this was a good time, and I spent last summer learning how to ride a mountain bike.
The first thing I learned is that mountain biking is almost, but not completely different from the road biking I'd been doing for almost 20 years. The bike is heavier, with a sturdier frame, big knobby tires and suspension components, the shifters are different, the posture is different (you sit upright on a mountain bike, not down beak-first like on a road bike), and that's just the bike (my road bike looks positively spindly next to the mountain bike). Riding trails, over roots, drops, rocks, under tree branches, up and down Hills, across creeks, that takes a different mind set. It took me a while to get past some of my road biking instincts, because some things you do on a mountain bike (like mud, gravel, tight turns) would be certain disaster on a purely road bike.