Actually, true green eyes are very unique Enty. I don't know hardly anyone with them, not like your color. The pale kind of green/grey is more common.
What make me unique? What stands out? Well, that's a tough one since we hate to stand out!
First off the obvious, just being an INFJ and all the characteristics associated with that: thoughfull, insightful, empathic, creative, calming and peaceful. My blend of traits is, like all of you, not very common and has always made me feel a bit different. I too am considered to have a good sense of humor. It may take me a bit of time to warm up to people, or to a particular situation. Once I do I can be quite funny and clever. I come from a whole family of jokesters, so it comes very naturally.
I've always been one of the most intelligent people in any room I'm in, but unlike a lot of people (and other types), I felt no need to announce this loudly with my actions, or through endless chatter. Kind of a quiet inner confidence of my mental abilities I suppose you could call it. I like to observe and gather. I like to break things down and figure them out. Not necessarily technical things like math, but things such as words and phrases, people and relationships, humans and our place in the scheme of things. I think this make me (an most INFJ's) unique.
I'm very good musically when I put my mind to it. I usually lose interest in an instrument after some period of time. I have played violin, drums, guitar, harmonica, and Ukulele at some point to differing degrees. Musical talent runs in my family, we all have it in some measure.