My favorite and most played games in chronological order:

Commander Keen 1-4
Duke Nukem 1-3
Wing Commander I
Doom 2
Duke Nukem 3D
C&C
HoMM II-III-V
Half-Life
CS 1.6
- favorite maps: cs_docks, cs_rio
- favorite servers: Internord, DustyDunes, MuppetsOnWeed
DotA, DotA 2
BF3, BF4
PUBG