Yeah, there're soooo many possiblities to play D:OS !
For me D:OS stay above all earlier Divinity games regarding replayability ! A very strong one it has and I really love that a RPG has a strong replay value !!!
On 7th of february 2015 : I start a new adventure in the Divinity world of Original Sin, it's a Fantastic Freaking Fabulous Funny ... it's my All Time Favorite One !