We got 2 version of Thanos. One with Josh Brolin in 2014 GOG and one again Josh Brolin in 2048 Infinity War. Which one do you like more? The 2014 more comic book accurate one, or the 2018 more human like one?
2014
2018
We actually get both 2014 and 2018 Thanos in Endgame.
2018 Thanos is a much more nuanced character who actually has regrets and is capable of feeling love.
His exchanges with Gamora, Dr Strange and Tony show that he has depths, and actually believes in his mission - crazy as it is.
When he meets child Gamora in the soul stone, after the snap and she asked what it cost, when he answers "Everything." There's a lot of emotion there.
2014 Thanos in Endgame is less layered- but strangely a bigger badass, he crushes Worthy Cap, Thor and Tony without an Infinity Stone in sight. His fighting skills are on a par with Cap's easily.
While all this makes him a bigger threat, it also makes him a slightly less interesting character.
Thanos in GOTG is menacing but we don't really see enough of him to know just how crazy he is.
Tbh this is pretty far from the comics too, as Thanos doesn't really smile or make petty threats, he just kills people.