I really like Minerva as well, maybe I should replay it now on my brand new Full HD monitor just for the sake of it.
I can't recall the names of all mods I played despite the number is not really big. I enjoyed map packs from RTSL challenges - NostalgiaVille was short and good for the most part.
I also remember playing DoomED for HL2 more than 10 years ago - it was pretty scary for me for some reason back then.
Retribution for the first Half-Life brings some good memories as well mostly because I played it long ago and I really liked the atmosphere in the first maps.
Put your lists of your favorite maps
Example: My favorite maps and modification of Half-Life 1 is Back to Xen for Half-Life 2 will Year Long Alarm.