I think the .Club registry is one of the most successful new gTLD registries. I want to share an interview NamePros conducted with Colin Campbell, CEO of the .Club registry. The interview took place at NamesCon last year, so it is interesting to watch it one year later. Kevin Fink conducted the interview.
The NamePros team conducted quite a few interviews with other industry executives, and you can catch them on its  YouTube channel. It’s neat to witness the growth of NamePros over the last couple of years as it expands beyond a standard forum format and adds videos, interviews, auctions, and other features. I am not an active participant, but I enjoy visiting regularly.
.Club is one of the better new gTLD extensions and registries.
If I had to buy just one new nTLD, it would be .Club.
I would also buy .Web as well when it became available.