I guess I am complex. I feel that way inside, with thoughts racing and branching off all over the place. I think Ni can be pretty complex and I perceive things symbolically in a way many don't. I don't always understand straightforward things staring me in the face but I can often intuit a universe from a grain of sand. I also don't always understand my own reactions, though I can predict them much better than I used to be able to. So it may be too much to expect others to understand, as much as it hurts when they don't...
I'm not sure how others perceive me. Almost everyone only sees one or two or three parts of the whole. Some just see me as laidback and even a bit bland. Others get glimpses of the passions, but think they are mainly intellectual (some of them are, but not all or even most). Others see me as a worrier... It all depends how close you are to me and in what context we've interacted.
I think some people are blindsided by how I can be highly emotional and highly logical at the same time. I think it's somewhat uncommon to be able to describe your emotional states, even great turmoil and anguish, in an almost coldly logical way. I can do that, at least when I've acquired a bit of distance from the emotional turmoil, and I think it confuses people as to whether I'm more logical or emotional. I am both, but really more emotional, I think. They do not rule each other out!
Sometimes even people I've known for years have kind of boggled at me when I'm really upset about something and said "wow...I didn't know this sort of thing hit you so hard." I find it strange that they could not know, as I've probably told them that I've really suffered over things in the past. Maybe they have to see it for themselves before it makes any sense.
I can't decide whether everyone is fundamentally complex, or if some are simple and some are complex. A lot of people are definitely much more straightforward. Some people seem simple and straightforward and I have a hard time believe they're anything else. But in many cases people have parts of their personality that seldom come to light so I could be seeing a small part of the whole - as many do with me.
I certainly agree with Fidelia that simple things make me happy. Listening to me babble about things I care about; letting me know you're thinking of me or want to spend time with me; telling me you appreciate me, though I might seem a bit embarrassed by it; giving me a little gift that shows you know what I like; all those sorts of things. Most of all, making an effort to understand me. But perhaps that is a complex thing, not a simple thing.