Help me with my new avatar [an irrelevant post with GA LV3+ inside]

After about five years using the same profile picture (a caricature I made of myself) I decided to change.

The problem is that I do not know what to use, so I thought I'd appeal to some of the games and characters I like and ask for help from the community.

I took two Borderlands images and one from TF2 and would like them to help me choose some (if you have any other suggestions just say so).

Here are the options:
https://imgur.com/a/tiuTg
https://imgur.com/a/GQL7L
https://imgur.com/a/k3yJ1
https://imgur.com/a/aSE5y same image, only with the original gray background

And the mandatory GA

Thank you, community!

P.e.: And it looks like I messed up the pool trying to put the options as links to the images and... well... ignore that, please. Apparently I can not fix this. : S