Maybe this will be the year I finally learn Rust. Like Larry if I am feeling like using a compiled language, I reach for Go or C (probably in that order these days), and my day job is mostly Python, which once you get over the syntactic whitespace, really is pretty much just executable pseudocode, which turns out to be rather nice.
FORTH is fun and everyone should learn enough of it to get the feel of a stack-based language. You can have most of the fun with a proper HP calculator (I never owned a better calculator than the 28S). Not sure how relevant FORTH is anymore, but it makes a nice palate-cleanser. Of course if you turn the stack on its side you have a list, and writing in LISP dialects is also fun.
This also may be the year I dust off and get good at IBM 370 assembler. I've got a vanilla VM/370r6 and one with the SixPack and DIAG58 and all the bells and whistles (including a screen editor not a million miles from good old XEDIT) running under Hercules. So it seems like taking a crack at getting v7 for the 370 going is something I really should do. And I talked to someone--don't remember who without searching my email archives--about bootstrapping from v7 to whatever the latest Research Unix we can find is. That'd be cool too.