How much effort goes into your pleasure time?

Sometimes, as has been said, I just do it to get off, but often, I see something that turns me on and makes me want to cum, so I find similar material and use that until I found something that just turns my brain to mush and makes me gush. For example, if I see a cute anime girl in a swimsuit, I search for pics and doujins with girls in swimsuits. If I see a great ass, I search for anal. That sort of thing.

Depends on why I'm doing it to myself... (I'm not counting sexy time with Cherry, just "normal alone time"
If it's for stress relief, I just want to get it done quickly. Especially if I'm doing it over a public toilet.
If it's because I know I'm going to get laid later that night, the I just take a minute to keep myself a little wet and pretend Cherry is teasing me (because she does sometimes do that) and that helps keep me i the mood.
If it's because I'm horny and alone, then insert a bunch of variables here to determine how long I decide to play.
Fantasizing helps.

But as for actual sex with my partner, you'd be surprised how much effort goes into building the mood, especially on Cherry's end. She knows how to make me want her, up to the point where one time I just dragged her over to her room and made out with her mostly against her will, while trying to get her off by rubbing her through her jeans. (She was really being a teasing bitch the past 2 days though. )

There is also mood and amosphere (dim lighting, start up the oil burner, play music you can slow dance to at a really low volume so it isn't obvious I'm getting laid behind my door, and the occasional thing that relates to some sort of roleplay. )

I might spend about 5-15 minutes total.

honestly it depends how i feel, but i do usually fantasise about things throughout the day before getting a chance to actually do anything in the evenings. whether it sounds obsessive or not, i'll usually "get off" twice a night if physically possible, gotta enjoy alone time!

or find a partner, but that hasn't worked for a few years now oops

Usually I look for a decent video to watch for at least a good 5 to 10 minutes.

However, the excitement of searching for the perfect porno usually gets to me and my load is blown in the first 20 seconds.

This is followed by a couple of seconds of ecstasy and pride. "You finally did something right."

And lastly followed with me wallowing in my own filth while crying.