Is being extremely self-less a bad thing?!

Is being extremely self-less a bad thing?

I care more about others than even myself. At first, it probably sounds like self-esteem but its not because I fight over principles and ideas like a choice that seems wrong, I try to help the person by correcting that mistake. Next, I agree everyone is self-ish but I am very little that I only want to help. I don't know what I want in life either. I've taken career test and they all show I can do anything I want. The most recent one said I was average in everything measured with 1 or 2 points different. Another issue is that most people don't believe me at first no matter the issue. I've gotten used to it now but I always have to convince a person no matter what the issue. I'd make a horrible car salesman. Thanks.

2 weeks ago
As for the career issue, my parents paid someone who supposedly tested my interest and aptitude. From what I remember because it was about 5 or 6 years ago, he had to send in for the results, after they came back, he invited my parents too, he said I can "do anything you can put your mind to." I thanked him and left, on the drive home, I remember saying to my parents that wasn't worth whatever they paid. I bought a book recently about a week ago and that also said average in aptitude. I thought I did everything correct while I was taking it. Some were tough and those were probably why I scored average. Ex: In business, you should care more about the business than the customer. Lastly, since I have no real strong aptitude and no major interest, I'm stuck. I know a lot about computers but not enough to specialize in something. Currently, I work technical support and people yell and complain too much and get easily fustrated. Not good when people don't believe you usually. Help

No it makes you stronger then the next person