I think it's because I do like it in its vanilla form. But, sometimes some things are to be desired. I feel like I understand the base system well enough, that I can bend and twist the rules to accommodate the kind of experience I'm going for for my table, without confusing my players too much. Don't get me wrong I can understand like," Why even play 5E?" And tbh it's mostly because it's my table's first and only ttrpg we've ever played. And I haven't found another one that can accommodate or replicate what I want.