You can't remove emotion, but I think it's definitely easier depending on the image you show at the table.
At the tables, I'm very social and having a good time. So, I'm always laughing, chatting it up, cracking jokes, etc. I try to give off a light, fun image of someone who is just there to have a good time. I'll crack jokes like 'If I get aces next hand, I'm raising it.' And then I'll raise it with ATC and say 'you all better fold, I got ya!' The same goes for my bad beats, I always laugh it off and say 'nice hand'. So, it's hard to put me on a type of hand when my image is pretty much the same.
I think if you're playing really quietly, not socializing, just really concentrating, it's a lot harder to hide your emotions (if you're not used to it) because you're concentrating so hard on being stone faced, not showing any emotion, that when you do get a big hand, it could possibly be hard to hide the emotion.
Heck, in your case, smile with every hand you get. You don't have to play each hand, but you can smile and say 'next time' as you fold.