First, let me offer that I don’t tend to enjoy reading or learning new rules. When I first got into miniatures, I bought a number of sets of rules, and found that many had shortcomings, such as technical errors, ignored physics, things that really bothered me, so I just took to writing my own rules. Since then, I’ve mostly played homebrew stuff, as I find it easier to write rules, than learn them, and I end up with exactly what I’m looking for. Additionally, I’ve found that I typically enjoy other peoples’ homebrew rules more than most published rules. Not really sure why.
I find that a lot of the more popular rules today either offer too many mechanics or too little detail for my tastes, though I have found some sets that I would adopt, had I not already written my own. Ideally, I look for simple mechanics with lots of detail.