There are a lot of things I like about transit. For my way to work it means I do not have to pay attention or concentrate, I can do other stuff.
In new places it means I can look out the window and hop off if something looks interested.
Looking at a transit map often gives a good clue where interesting things might be located.
Figuring out what line to take where is fun, a bit like an adventure.
Or just getting on a line to see where it goes.
I also love that I can walk somewhere without worrying how to get back, not having my own means of transport with me.
Some places (like London) need to figure out how to become more accessible, because it is stairs everywhere.