You're in a similar situation to me. I collected almost all of the first 77, I've got about 3 left to get. I don't really like collecting MOC, I constantly worry about looking after them and get little enjoyment from them so that particular collection is fairly small. And I'm not that interested in the last 17 - it wasn't part my of childhood, but I have a few mint last 17 figures.
I found focusing on obtaining variant figures fun and doesn't need to be expensive either. All 3 x IG88 variants (dull, ,shiny and hollow eyes) are readily available won't break the bank. Same with Lando Calrissian (Smile and non Smile) and many others. They look great on display too.
Another suggestion is modern collecting. There are some really great figures in particular, the fairly recent Gamorrean guard with the furry pants and some of the stormtroopers and sandtroopers. Though you do have to wade through a lot of junk to find the gems if you go down this route.