I have a very broad interest in comics from all eras, publishers and genres, so for me there's always been the difficulty of keeping focused on one particular objective.
I don't feel that I have enough time or financial resources to complete anything particularly ambitious now that I'm in my fifties, and I'd rather just be free to read anything I want digitally. I obtained pretty much all of the mainstream keys I really want years ago, before the film speculation price rises. Very different to how I started in the 70s, when I was more focused on runs, especially X-Men and Conan, rather than an unconnected range of specific issues that mean the most to me.
In theory now, I'd do something a bit different, such as complete my 9.4 to 9.6 Richard Corben underground comic collection. That would be an interesting project.