its really fun with premade teams of i think 4 people (forgot the exact size), where you can do heists that are pretty difficult. you get way better rewards if you do them perfectly, ie hardmode and no deaths. almost impossible just pugging it since they tend to be intricate with multiple objectives and a shit load of hard enemies.
solo, its fun to just fuck around racing and PVPing and goofing off but its basically just a sandbox where you do whatever that tickles your pickle. you can make your own fun, like i enjoy getting cops to chase me, steering them into other players, and then when the other player hits a cop by accident the cops all start chasing them too. on console almost everyone is on voice too so you hear a LOT of shit talking and squeaky 14 year old kids so it gets uh interesting with yo momma and sex jokes
Its definitely more fun with friends and like JC2 MP its more a case of heres a sandbox with a lot of tools, its up to you to make your own fun. The only downside is that a lot of the cool stuff (tanks rocket launchers etc) don't unlock till you are higher level, and grinding that XP out can be a pain in the ass. Me and a friend do the stunters stuff all the time though, that player written map is awesome - one team is in supercars and is racing up these massive ramps doing 500' jumps, the other team is on platforms 500 feet up with sniper rifles trying to kill the people in cars. its crazy awesome
i want the whale mod tho