I think so?
I've been much happier since I dropped my weekly pull list, purged moderns from my collection, and at least focused on Silver and early Bronze age Marvel (and DC horror), but I find it incredibly hard to narrow my focus further than that for long. I have ADHD that is at times pretty severe, so while I can maintain interest in a broad subject (comics) I cannot easily focus on completing say one run at a time or collecting one sub-genre, etc. I'm way too compulsive and unorganized.
But keeping my collecting mostly within a certain era, while hard for me to do, is helping. There are enough sub-genres to spaz out on within the Silver/Bronze Marvel segment of the hobby to satisfy my dumb incorrectly wired brain. I can jump between horror mags/comics, super-hero books, specific artists, or something else to my heart's delight and still love them all. Of course, my one real goal is to have a complete X-Men run at least up to 144. I chip away at it here or there, but I know that if I could achieve the kind of focus a normal person can I'd have finished it long ago. So that's frustrating, but I'll get there eventually.
All in all though, yeah I'm happy with how my collection is going. I don't think I could ever narrow my collecting down too much, so I just try to buy quality copies of comics within my chosen genres/eras and do my best to stick to that.
I don't know why this question was so hard for me to answer.