It is difficult to choose between so many awesome DApps on Hive from games to mobile and video platforms!
But the ones I use the most almost on a daily basis is Actifit, 3Speak and Ecency!
Actifit speaks from itself as it motivates me to "walk to earn" and it has been my way to keep consistency in posting everyday with their feature inside the app to create reports!
3Speak together with some support of other members gave me confidence and motivation to start creating videos! I did started with DTube to be honest but as soon as I understood how to work with 3Speak I fell in love lol so easy to use and the support from the team with upvotes is awesome!
As for mobiles I've been through a few like Partiko and Dapplr but Ecency kept consistent in improve and develop so today is my best friend to be on top of things on Hive and especially now at my offline job I can even use it through the browser format when Hive is kind of blocked in the work PC (their firewall or whatever thinks it's a game ahaha but accepts Ecency website shhh)! Not no mention their gamification feature with their points system!
Again, it's difficult to choose one so I hope picking 3 is not too much :)