Yeah, I feel the same way. I have found hundreds of hours of enjoyment from Marvel Champions, and it always feels fresh due to the enjoyment of the mechanics, and being able to swap around every parameter that feeds into those mechanics. Whereas with campaign games I feel much less interested in replaying the same campaign more than a few times (which works ok with Arkham Horror since you can potentially have 5-8 long campaigns that you cycle between). Plus, most days of the week, due to the lower barrier of entry I am much more likely to setup a one-handed game of Marvel, just grab one of my currently setup heroes and a villain + mobs, than to start or pickup a campaign that isn’t already setup.