I love a lot of bips. 32 is one I can't imagine going back to not having. 39 is pretty convenient even if good alternatives exist. 157 and 158 are neat to make neutrino possible -- how else you running a self contained LND node on your phone without needing a full node? I have one, but not everyone's got the means.

328 for music2 makes ark viable -- sorta clutch there.

65...who can do without CLTV?

Bip 42 is funniest though.

119 for CTV is the one I'd like to see implemented, along with 348, CSFS.

Just to name a few.