That's San Andreas. I loved all their missions and even though they also could be reduced to only, driving, flying and shooting they all felt distinct and memorable.
Invading Madd Dogg's mansion and stealing lyric book and delivering it back OG Loc who had a party in your hood was fun. Stealing jetpack for a hippy, burying alive someone in construction site while they are in portable toilet, doing heists with Catalina, all that was fun.
I can't seem to recall a single GTA 4 or 5 mission / moment truly memorable besides the line "Causin, let's go bowling". Maybe it's all related to when I played SA and probably my memory was better then.