I like these questions
1. Do you think you're sometimes more selfish, mean, and less lovey-dovey than what people think us to be?
Yes....but I do have a gentle, caring side. I think more nice things, feel warmer emotions, and have more concern for people than I express externally. It was not until I examined my behavior and motivations that I could see myself as a feeler though, because I'm also self-absorbed, temperamental/snappy, and not a people-pleaser. I admit I can come of as crabby, stubborn, critical, and aloof.
My mom and sister also told me I am not "romantic" once because I don't like the cheesy stuff they do, but I am romantic, in the true sense of the word. I just hate mushy-gushy stuff, and that can make me seem unsentimental when I
am sentimental. Affection actually makes me feel very vulnerable, so I have to feel very safe and comfortable with someone before I go there.
2. Do you in fact have a pretty dark side, which find a lot of people and things shallow, and unlikeable, and you'd like to stick pins in their eyes? But you wouldn't actually do it, because you are pretty nice realllyyy?
Yes, haha. I very much have feelings of disdain, but they are quieted down by my desire to understand different perspectives and give people the benefit of the doubt. This side of me comes into the light most when I'm contrasted with a T friend, such as many INTPs I've known. I think I struggle to stay idealistic and not become cynical, but it's the dashed idealism that leads to those feelings of contempt towards people. I want to think well of people, and they keep letting me down.
3. Do you feel frustrated towards people that don't care about things that really matter? Do you get frustrated at those that seems to only care about sports, clothes, and their hair?
Sometimes....I don't see myself as being "too serious" but my ISFJ mom has criticized me as being "too dark", telling me "everything doesn't have to be deep" and wondering how she produced such a "deep child". I don't see myself as "deep", but I get bored easily with the style of communication and activities that the people around me prefer. Or even when we enjoy the same things, it stems from very different reasons, and it disappoints me when they are less willing to dig their teeth into the meatier parts.
4. Do you often feel lonely?
I do....I yearn to connect with people, but I withdraw and isolate myself because it feels futile to try at times.
5. Do you get random ideas in the middle of the night, and you get so excited thinking about doing it tomorrow, but then tomorrow comes and you're not excited about it anymore, thus don't do it?
I get a lot of ideas (often at "inconvenient" times) and I give up on them because I realize how much work it will take

. I tend to be most creative at night though - I've taken to keeping a notebook by my bed to jot stuff down so I don't forget it. Sometimes it's just a phrase or whatever.
6. Do you consider yourself unique?
Yes and no. I'm the typical atypical INFP
My motivation is to self-express, to reveal my identity, not to form an identity in relation to others. This means I may not seem unique in comparison, or I might seem very different, because my ideas are rather isolated while forming & I don't consider if it's original or not. Not to say I am not influenced by the external; I very much get inspiration from outside sources, but it's not a conscious decision to fit something already existing, but rather to find things that fit me.
Ever since I was a child, I had a keen sense of being "different" somehow, and people's response to me either confirmed or inspired the feeling. It's hard to know which came first. I enjoyed the idea at first. Being "weird" was good, but you hit an age where it's not, and those experiences affect you. It took me awhile to get back to the place where I could revel in being, well, odd.
7. Do you literally feel other people's pain?
Not really. I feel like I identify it, and often identify with it, but it's not that I experience it in that moment as I would experience my own feeling.
I might compare it to smelling coffee being made, and identifying it as coffee because I know what coffee smells like, and I can vividly imagine tasting it, but I'm not actually tasting it. Of course, it's not nearly that literal or linear of a connection, but you probably get the idea....
8. Are you a bit (or a lot) of a music snob?
Yes, guilty! hahaha.
I'm not as nearly critical as I used to be. I've realized not everyone identifies so strongly with their own tastes, so it's unfair for me to identify them with something that is not very important to them.
9. Have you had people you've never met before tell you their life-story?
ALL THE TIME!!! I feel like I have "THERAPIST" tattooed on my forehead sometimes.
10. Do you think the world would be a bit better with more INFP's?!
Not really. I have this idea that there are less of certain types for a reason. INFPs are very much idea people, but too many ideas and not enough action is not a good recipe. SJs are very populous for good reason, but it's great when they recognize the value of the "rarer" types and listen to their input, instead of just criticizing them for being "different" and not attempting to understand them.