I do it only when my yard starts looking completely nasty. I don't make it a point to go out and keep it pretty 100% of the time, nor would I ever care enough to.
I'm pretty good at trimming bushes, I do it sometimes at work in the summer time. I can make a bush into a perfect square / rectangle or any other shape. 🙂
Do I like it? Meh... My backyard is crazy right now. I need to get on that.
I moved to an apartment so I don't have any yard work! 😛
But when I was living at home I used to help my dad out but eventually I passed out while trying to help because I found out I was allergic to the grass when it was being mowed.