What's the best MOBA?

I dont consider overwatch as a MOBA. Some may, but it definitely isn't a traditional one. As for the others, I've put in at least 90 hours into Dota 2, Smite and League (in that order), and I just prefer league. It so much more fun.

How do you consider a moba to be the best? with balance? features? refreshing features? graphism? it's impossible to tell which moba is the best, because some people will prefer balance, the other will prefer design.

"but you can compare them to the fun they bring", you will need to play all moba for at least 1 year, to discover EVERY piece of it and then you can know which one is the funniest, and that's not all because they all evolve every patches, for example in 6.87 dota 2 3 months ago ice-frog gave mages scaling and this is totally upsetting because league's players were saying that mages weren't fun because of the lack of scalings.

Don't forget Heroes of the Storm. One of the characters from Overwatch made a guest appearance in the game since both Overwatch and Heroes of the Storm are both made by Blizzard.

Option 6: they're all trash.

Is Overwatch an option in "best moba" so we can understand who's opinions don't matter?