I bought Drive Club, Forza 2, and The Crew, for science but also because I hate myself.
The fucked up thing is that all three are good racing games.
The Crew you need some bros to play with though, because some of the missions seem too hard without allies. Forza I've played the least, maybe two hours, probably because it's more of a known quantity, whereas Driveclub and The Crew were intriguing.
Seeing as I'm late to Driveclub's launch BS, I'm finding no trouble with the online aspects. Same goes for The Crew, although The Crew uses Uplay

Also if it matters, The Crew is also the only game running in 60fps, pretty easily. Yes the graphics aren't as nice as the other two games, but the scope is much bigger, so that and the superior framerate in some ways makes up the difference.