The dataset I found really interesting is the "Anime Recommendation Database" from Kraggle because I am a big anime fan.
www.kaggle.com/CooperUnion/anime-recommendations-database
The dataset presents information on user preference data from 73,516 users on 12,294 anime. It includes seven categories: anime_id : unique id identifying an anime from myanimelist.net, name: full name of anime, genre : comma- separated list of genres for this anime, type: movie, TV, OVA, etc, episodes : how many episodes in this show(1 if movie), rating: average rating out of 10 for this anime, members : number of community members that are in this anime "group".