Damn this is exactly how I feel whenever I save up to buy something for my retro console setup and then only play it for like 20 mins once I get it up and running.
Hobbies are weird.
I guess I'm lucky that when I get a character I really want from the gacha that i'm thrilled and remain happy I have that character for a long time. I pulled a couple girls I wanted badly last fall in Kirara Fantasia and I'm still ecstatic that I have them.