I detail everything. A lot.
I used the leaf blower after every use. Clean with a mild detergent all the way up to the green or purple stuff as needed a few times a season and one or two coats of wax in the spring.
I also use a fast detailer spray a few times during the year. I use a protectant spray (like armor all but I use another brand) on all the plastic and soft parts.
Really like my stuff to look new and clean, its easy to spot any oil leaks or other issues that way. Plus if/when you sell, they tend to sell right away for top dollar.
Here is my 2002 Toro that I just sold 2 weeks ago in a matter of hours.