Get rid of the emoticons. Argh.
I'm gonna go section by section and give you my feedback. I have my own profile, which you can go look at; I'm not saying it's perfect by any stretch but I have managed a few dates out of it.
http://www.okcupid.com/profile/DoriansPortrait?cf=profile
Self Summary:
You're too vague here, for the most part. "I'm an easy-going individual... enjoys hanging out with friends..." Find me a person who describes themselves as "uptight and I hate my friends." There isn't a lot of substance or information here. You've basically said "I am a normal person." A good rule is 'show, don't tell.' In the way you write or describe yourself, you can portray the fact that you're easygoing, or that you do things with friends.
You then use the word 'hobbies' twice in as many sentences without telling me anything about your hobbies except that you enjoy them and change them often in an effort to grow. I would instead write about a hobby or two, and maybe how you feel they've helped you grow. "Getting out of the house and learning salsa dancing last summer really boosted my confidence and energy!" "Learning guitar has helped me appreciate music in new ways." Etc.
The same goes for the rain thing. Tell
about what you like, not
that you like it. "I like rain." Well, to someone like me, who finds rain a dreary pain in the ass, I'm gonna go, "kay then..." but if you write about how it's nostalgic because of xyz, or you enjoy the smell of rain, or the moody atmosphere. I'm not saying to wax philosophical or write a poem, just say a little bit of 'why' in addition to the facts.
"I have a great sense of humour," is an insane thing to say. No one,
no one on the entire planet thinks they don't have a great sense of humour. Show, don't tell! Be funny in your profile, in whatever style you like to be funny in (though remember things like sarcasm are hard to detect via text sometimes).
What Am I Doing with My Life:
Don't complain about your job. Even just saying 'sometimes it's taxing.' Nobody likes a whiner. You say you've had the job for six years; that's good! Shows stability, etc.
The next part with your hobbies is disjointed. You start talking about hobbies, then mention the gym (do you consider that a hobby?), then go back to some hobbies. Talk about working out, if that's a significant part of your life, anyway, then talk about each activity in turn, why you like it, what you get out of it, same as above, really. Also avoid jargon/acronyms. What's HTPC? I don't know without Googling, and your account shouldn't say "I am worth doing extra research to understand." Nobody's that cool.
I'm Really Good At:
This section is about the stuff you're good at. So please don't begin every sentence with "I'm really good at..." It's repetitive. Just talk about the thing. "I have a knack for diagnosing computer problems, and really enjoy my work because of this." "I love to do research and reading up on various topics that interest me."
These are just starting points, feel free to elaborate into paragraphs of course. Also don't use the word 'random'. You don't have an urge to learn about random things. You're not random. No one is random.
This is just a pet peeve of mine.
First Thing People Notice:
Except for emoticon, which I would eliminate, this is good. It's true: you're tall, and it's a quirky fact that you're regularly asked for help because of it. Plus it portrays as someone people feel they can approach.
Favourite stuff:
This is a list of stuff you like. Hard to be wrong/bad. Unless you wrote "Heroin and hookers" or something.
Six Things:
I think this is a stupid question, but since OKC asks it, I'll critique your answer. Computer/Internet are basically the same to most people. Don't list them separately. Find something else to add in here.
I spend a lot of time thinking about...
The first and third things you've written go well together, put them together. You have several instances of disjointed sentences/thoughts in your profile. Try to keep similar topics together, this is a basic writing skill.
Friday Night:
Concise honest answer. Works for me.
Private Thing to Admit:
Is that really private to you? I mean, don't get me wrong, I also think this question is dumb but if you're going to answer it, answer it with an actual private thing or a good joke. That you are annoyed by stepping on cracks isn't going to make people think you're being open, funny or interesting.
You Should Message Me If:
Narrow this down to like... two things, or a simple sentence. Only one of those is a conversation starter: vegetarian recipes. The rest are either jokes (pokemon? muffin man? turn signals?) or too niche (MLP? Ender's Game?) to cast a wide net. While I've said jokes are good, you want more of your genuine side to come through (I assume). Vegetarian recipes, awesome. What else? Maybe 'if you're the type to grab a pint and watch the rain from the warmth of the pub.'
Anyway, this isn't meant to sound overly critical, I'm just hopefully offering useful advice. Cast aside whatever you feel is unhelpful, and use what might work. Good luck!
[DOUBLEPOST=1371595025][/DOUBLEPOST]Since you're pretty obviously on the geek side of the fence, this guide might be helpful. Haven't had time to read it myself though. Caveat emptor and all: 
