Liam..

I like how Liam was a doer.  A lot of people are scared to do and he isn't.

It's not that I don't understand why people are cautious (the consequences can be dire for making the wrong decision) but Liam is an outside the box thinker who is willing to take risks and rather than just complain about things, he was trying to do something about it.

If I could, I would have made him the Ambassador or whatever because he was already trying to bridge gaps without being given a title and his thinking on how to bridge those gaps was genius/brilliant sometimes.  Making sure everyone had a voice mattered to him from the start.  Building an understanding and healthy relationship between species already mattered to him and it mattered to him in a genuine way where he wasn't just trying to take advantage.  He wants all of us to get along together and as equals.

So I like Liam.

EDIT:

@fudgietroll

"...I didn't know that this was Liam's job. I got the impression he was supposed to handle security..."

Actually, according to the Pathfinder Field Team Manual, of which he is a part of said team, it is part of their job to

"...Establish diplomatic relations with local inhabitants..."

So Liam was taking initiative and doing his job on that front.