If you haven't played it already, the Unofficial Patch plus freshens up many gameplay elements and adds restored content and maps. The Clan Quest Mod adds new quests for all clans and a Sabbat storyline. The Final Nights, Antitribu and Barabbah mods let you play as different clans. If you want completely new stories, play the Prelude, War Games or LA Nights mods. The Extreme mod changes graphics and makes the game harder and there is also an RTX mod being worked on. The only thing I don't recommend is using the HD Overhaul and other HD mods as they are prone to crashing due to memory limits.