Least and Most favorite game modes?

Least Favorite - Grand Conquest/Rival Domains

I have no favorite.

Favorite: Story Chapters
Least Favorite: Arena (Mainly because I find the scoring system to be flawed to the point where I just don't care about it that much)
Arena Assault shares this issue, but since it's a less important mode Arena itself wins out.

Most Favorite: Tap Battle. It's a nice break from the normal formula of the game and somewhat fun and challenging.
Least Favorite: Squad Assault. Enough said.

Most Favorite - Special Grand Hero Battle Maps. Love getting a new unit and although it make take a while, figuring out how to beat the tough maps is satisfying.

Least Favorite - Tap Battle. I like the rewards, but once there are no more rewards I don't play.

Runner Up Least Favorite - Chain Challenge. It's not that I don't like the mode...I just hate spending tons of time to fail on map 10 of 10 lol.

I hate pretty much every game mode except for Tempest Trials and Blessed Gardens :/

Most Favorite: Tap Battle
Least Favorite: Grand Conquests

Honorable mentions to Rival Domains and Tempest Trials. They lose to Tap Battle due to some annoyances with both, but they're both still fun in their own ways. Bonus points to RD for making the friends list relevant.

Dishonorable mention to Arena. Don't think I need to explain why lol.

Favorite: Story chapters because I like to see new things.

Least Favorite: Grand Conquest/Rival Domains. Fun at first but then it got boring and repetitive for me.

Runner up to favorite: Tap Battle, mostly when they put songs I really like.

Runner up to least favorite: Arena, mainly my reason for why I hate Heroes' community and the latest speed powercreep.

Favorites: Maybe Tempest trials (especially the next one) and the normal mode (Story mode/Paralogues). I think Grand Conquests is alright thanks to the rewards.
Least favorites: Forging Bonds (I definitely think IS can improve on it in the future) and Voting Gauntlet, mainly because of all the salt that's in the air during that event ^^; All you really need to do in that mode is just guess who will win the last round and claim the feathers if you won.

Favourite: Grand Conquests because we're talking real tactics vs strongly built opponents and no nonsense with BST or SP. If you don't have merged units on your friends list it can be rough though. I also like chain challenges and GHB/BHB/LHB (TT, however, I find bland).
Least favourite: probably TT. I find it monotonous and tedious. I don't like anything in this game that promotes mindlessness. Don't really like VG too much either because it's such a toss even going into one battle (three reds vs three blues? Have fun), but it's not mindless.

Most Favorite: Grand Conquest
Least Favorite: Tap Battle
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I think that I'm in the minority here, but I greatly enjoy Grand Conquest. I love getting the chance to use units that I never got around to building, either because the unit is 5-Star locked or because it was a unit that I didn't really know/appreciate, and then pitting them against a bunch of other people's builds. (Shoutout to the person on my Friend List running the Close Counter + Savage Blow 6 Saizo with Smoke Dagger. That build's so helpful for these modes.) It is also the most reminiscent of mainline FE, to me, because of the larger maps, the seizing of points, and the strategy required to take the points--especially on the highest Infernal mode, where AI can, once again, attack after warping.

Conversely, Tap Battle has none of that, and I'm not really a big fan of Rythm games. It can be a nice break from the main features of Heroes, but I get bored of it really quickly. It's such a pain to try and get the rewards.