What do you want from a game of EDH and could you explain what you mean by "meaningful interaction"? When I think of interaction in EDH I think of cards that answer an opponents threats and just want to understand what you mean.
Combat before turn 10.
Trading pieces like in chess ("I attack your thing- I know it makes my thing vulnerable, but I'll risk it because getting rid of your thing is worth it!")
A rapidly changing boardstate- in most of the games I've played, it becomes evident after turn 10ish whose combo is going to happen and who is crippled for whatever reason, and a pod of 4 or 5 people into a game where 2 people are racing to make their combos work and everyone else is waiting to die or simply betting on the chance to draw that one card to board wipe and make the game last another 45 min.
I actually like cards that force your opponents to do things like pay mana or life to draw or play cards. I rarely play a green deck without Essense Warden or white without Suture Priest, even though it makes me such a target every single time. My playgroup hates effects like those for some reason. In my idea of fun, everyone is playing cards like that, not Slivers. Fuck slivers. And fuck those D&D dungeon cards.
I like Planeschase and play with it as often as possible because of how it makes stuff actually happen and shakes up the dynamic of the game. The planeschase deck I use is also slightly modded in order to be biased towards effects that make the game go faster like getting extra land drops.
Probably my favorite card is Share The Spoils followed by Flood of Mars because what fun mechanics lol. Anything that involves people ending up with each other's cards, or cards changing unwilling into other cards, is fun in my book. I don't think I even have decks with those cards though. I just like to play against them.
I can't believe I haven't heard of Grothama before! That seems right up my alley.
I was a big blue-hater for a long time because I've been stubborn about selesnya for the whole decade I've been playing, but maybe I should open my horizons and see if I can force more fun into my games.
The draft thing was a few years back. I think it was Ravinca Allegience. I give most of my cards away to buddies in exchange for them building me decks because I refuse to follow the meta or look at mtg-related media influencers due to all the trannies and SJW shit. Ignorance is bliss.
I know commander games are long but I think something is actively unbalanced in my playgroup that games just drag on and on and on. I have been in
several games where we had a newcomer, and the newcomer scooped because "I'm not doing this anymore" after boardwipe no. 3. We also have a few people that bring ragamuffin children who can barely play, which is fine in theory but their turns take 3x as long because they don't know what's going on, which adds hours to the games throughout the night.
I still have fun shooting the shit and seeing everyone- I still go regularly, but yeah the actual game I'm not so in love with.