I think ROOT would be fun but haven't played. Here are a couple of reasons why, which may be applicable to others and provide value to you.
1. I haven't seen a thread on basics for how to get set up to be able to participate. I.E. generally how it works, what platform is used, how to access that platform, general schedule of sessions (so I can plan ahead), etc. If there is, it should probably be stickied somewhere. If it is, my bad.
2. Time is a huge factor. I like the idea of having an "open play" style which could provide a lot more flexibility for some, however it seems like the advantage would go to those with the most time on their hands, which wouldn't particularly be fun either. But as it stands now, I would feel bad signing up for a session and end up not being able to play games because too much was happening in any given week.