Hots is not really a moba to LoL and dota, it has it's own unique genre. Hots is more objective based and actually team skill rather than LoL and Dota where you can literally carry your team with items, champ etc... The other thing about Heroes of the storm is that they cracked down on negative players really fast unlike riot where the community is so toxic that it turns you off.
The second distinct feeling about Hots is the champs that are included in the game. If you have played , Warcraft 3, World of Warcraft, Starcraft and Diablo; then this game would bring up alot of interesting memories over the years. If you have never played any blizzard games before, then you just don't have the feel like you do in LoL or Dota.
The last thought is Hots is based on being around friends, (since it's team leveling and objective based, the communication is crucial to win.) Never talked to people about the game individually until they have tried the game with friends, it makes such a big difference.