Shadowverse

This Dark Alice is so boring...

Yes, she's a bit boring.

The Sylvan faction doesn't really have any good candidates for a leader; they all seem mediocre to me. I'd vote for the beetle, but mostly because there aren't any better options.
For the Academy, Celia is definitely the best choice; I don't see any other options. She's even a better leader than Albert.
For the Stronghold, Levai is good; they really need someone like him in their roster. The others are just okay.
For the Dragon, I'd choose the summoner; I like that card. But I don't think he'll win.
For the Dungeon, there are two good options right away, in the form of Ceridwen and Aisha. But I like the first one's personality much more. She's one of the best Dungeon leaders in that regard. The second one is just a pretty picture.
For the Inferno, the swordswoman is good, and so is Karaboss. But Emeralda is much better than both of them. She's the perfect leader.
For the Haven, it's definitely Brodie. None of the other options can compare to her.
For the Fortress, it's Sapphire. She also stands out positively compared to the other candidates.