I don't know if this can be classified as a legit "regret" or not, but anyway (hence no wk78 tag).

I've always chosen to focus more on the theory behind computers and computing rather than on practical dev skills. Not saying that the more theoretical things aren't fun - concepts from theoretical CS and maths still regularly blow my mind, as do the more "esoteric" languages like Haskell, Idris, and Coq. However, after seeing you fine folks here at dR talk about practical development, it feels like there's a whole world of stuff that I've missed about computers and programming, especially web programming. I think I'll tackle that next when I have some free time, maybe spend some time learning PHP to see what all the hate's about... (really though, it must do something right if it has such a huge userbase, plus, I think devRant uses it too...?)

Anyway, just wanted to say that you folks are really cool and an awesome source of inspiration. Best community ever.