I had lots of fun watching C9 last year because their strategy was built around early game leads and dynamic early plays to create victories in ~20 - 25 minutes. However, it seems they have shifted away from that.
Are there any other teams (worldwide) that play that way now? I have fun watching those games more :)
Depends on your taste. For me it's teams that aren't afraid to show a shed of innovation and are willing to push the envelope no matter where they are in the standings. This innovation can come in the form of off the main competitive meta champions, macro play, or just the sheer variance of aggression vs methodical play.
That said, among 4 of the 5 major regions, I established CLG, Splyce, Bilibili, Rogue Warriors, MVP, and bbq Olivers as those teams I find fun to watch. But that applies if you're not really going to be disappointed to see them should their success not be there or they're just a mess.
