lol can't take any of his characters seriously in any film
He just always looks like he's holding back a dumbfounded smile, and just has a more soft vibe to him. Idk, something about his presence is more gregarious, and anything but intimidating--maybe it's his small mouth and timid looking eyes. His role in GOTG was more appropriate for his appearance, but still a bit facepalm. I just think he needs some acting lessons, especially when it comes to putting off the right level of stern ambiance for his roles.
http://cdn2-www.comingsoon.net/assets/uploads/2016/04/bautsita2.jpg
^ how I generally see him personified lol
but I think he should try to go for looking more stern and vicious, like here >
http://cdn-static.denofgeek.com/sites/denofgeek/files/styles/article_main_wide_image/public/dave_bautista_0.jpg