Since you guys will NEVER stop complaining about the current champions that are popular and "fun for both sides", here's an easy, honest question: What champions should be popular in this game in which positions for this game to be as fun as possible for as many people as possible?
Should be a fun exercise if enough people participate with real answers. Try answering for each role, please.
I dont think there's such thing as a meta that's fun for all, but I'll give it my best shot.
Top- 
everything in his kit has clear counterplay.
Jg - 
everyone around here complaining about damage, but when ivern is strong he is not strong through crazy oneshots.
Mid - 
Clear windows of power, clear ways to exploit when he isnt strong and punish him.
Adc - 
Doesnt oneshot, has utility, and doesnt have crazy amounts of safety.
Sup - 
Another champion with clear windows of power and weakness.
Impossible to answer. What I would deem a fun meta would be the most boring meta for someone that enjoys the current one.
I don't care what you play where, I just want an average game length of 40 minutes instead of the 20 minute one we have now (+10 minutes because nobody knows how to end).
I can't answer this in a way that will please you or anyone else as I play off-meta. It's a good topic, though, and I support it.
Heimerdinger. He's in a pretty bad spot rn but hes a wild amount of fun to play.
Juggernauts and divers in top Assassins and nonutility mages in mid Anything in bot farm role that works
Anything except for enchanter supports (yes, even tank supports)
Jungle is always obnoxious regardless of meta so I'll take or leave whatever I get here
Kennen deleted from game
You already know the answer. It doesn't matter what is meta. People will ALWAYS complain about it
The face of a fun meta imo would be having the game be decided by execution rather than picks.
I think the problem is not the champions, but the items and the runes.
ATM I feel like the items and runes are tailored towards specific types of champions while others are left to rot simply because they don't have a keystone/item path that synergises amazingly with their kit.
I think Riot should remove power from items and runes and then we will have a more clear opinion on which champion's kits are strong, and which champions simply are made by runes/items.
I feel like too many people posted without answering the question...
I'll take anything. I'll try to adapt to whatever the meta is.
Everything from wetnoodle farmfest late game based meta to hyper aggressive skirmish early game based meta
