Yeah, it's an attitude of disdain overlaying insecurity. It sends a very strong message of "I am not interested", which is very effective people-repellent.
[MENTION=5109]Glycerine[/MENTION] hit the nail on the head - trying to address the subjective with the objective.
Right now it's like you've got two "vibes" emanating from you: the first one (what I called disdain), "pushing away". It has the potential to be dry-funny (humorous dismissal) or mentally intriguing (you must be disinterested in _____ because you are interested in something more important), but only if combined with a positive, joking attitude, or, respectively, a confident, inquisitive attitude. The issue is you're combining that with the second vibe, a "pulling inwards" (what I called insecurity), which also has the potential to be non-threatening and pleasant - but only if combined with warmth and openness - or the potential to be reflective and developmental - if combined with interest and internal growth - but it seems like the pushing away plus pulling inwards together are combining to isolate you from the external world - which I assume is at least part of what Glycerine sees in terms of you trying to solve a subjective and internal issue by addressing objective and external facets of yourself.
I hope this doesn't come across as offensive. It's not to say anything like "you need an attitude adjustment", it's just that you seem to be wanting to change yourself to be more attractive to others but the primary things that seem off-putting are subjective (and easier to change!) factors like your tone and the styles you choose to wear instead of objective factors like your face (which, I feel, is attractive) or your voice itself (which doesn't put me off at all). It doesn't seem to be anything intrinsic to you that is unappealing, but how you are presenting yourself currently makes it seem like you do not want to be appealing - even though clearly, from this thread, you do.
If you're not interested in any more advice in terms of the subjective, please just let me know, but I felt like this would be a more useful and truthful answer to the questions you are asking, as opposed to a superficial and easy answer.