Wow, you really got a lot of work done in a day. I do minimal prevention work, like with the gutters and drains before the rainy season, but most of the time I'm a if it ain't broke don't fix it guy. There's a small channel of water, kind of like a mini sewer that runs on the side of our area that I clean from time to time. That is the worst because there's a lot of gunk, and throwing the collected gunk is a lot of work.
Yeah, that's one way to go, I don't fix things that are not broken because they're not broken. Preventative maintenance saves potential suffering and expense down the track though, so I do it. Some don't.