That's going to be very much dependent on your location, commitments and a variety of other factors.
I love trail running through the local fields, but they're not viable in the winter due to the practicalities of wading through ankle-deep, heavy clay in the dark by a torch, plus it's a minimum of 50 min run which isn't viable at stupid o'clock in the morning when I already have an early start for work, and do need a certain amount of sleep. Even by daylight it's a heavy slog and more of a soggy hike than actual running. Also due to injury, I can't run up hills at the moment, and that's probably a few months away and needs gradual building up to it. Realistically it could be the spring before I can get back to those routes.
Many of the flat routes by the river are popular for anti-social behaviour so I need to be careful about timing on top of my work and family commitments. This is also complicated by several sections being impacted by flood defence works and closed routes and bridges reducing access. The nearest canals add a minimum of 20 mins drive time each way, and are rural so not lit or paved, so again, limited for their usefulness in the winter months and work days when time is very limited, plus fitting around evening commitments.
For many people, running is shoe-horned into little gaps in life that significantly restrict the choice of where to run, around (inflexible) work patterns, safety and how to fit certain types of run in and you have to suck up what fits albeit imperfectly, rather than your dream route. It's often decided by situations like making the most of the park by the leisure centre to use the free 45 mins while a child is at an activity during dog walk o'clock because that's the time and location that fits best over not fitting in a run at all.