<human>: Hi Reddit,
I turn 21 today and was rather sad for not achieving my targets that I had planned 2 years back. Not that I am unsuccessful, I had really big plans (way too ambitious, you can say).

I sat contemplating my past. I dropped out of university because I disliked conventional education, I taught myself some good skills in software, web and design. Started my own business. Realized it's not so bad after-all and that my plans when I was 2 years younger were absurd.

Someone special told me to look at bright sides and asked me to list down things I am happy about achieving at this age. They are as follows:
* Developed excellent professional skills at young age, taught technical subjects to graduates although myself being a university drop-out
* Started my own freelance business, have freedom of time and money
* Have decent business network and popularity in my field
* Bought myself a car from my own earnings
* Earned myself a good lifestyle (Gourmet food clubs, elite parties, spending big bucks on fuel to drive my own car, helping my parents with some money)
* Director of a finance intelligence company. Soon to be a CEO of my new business within couple of months
* An excellent cook (as a hobby though)

I don't mean to be condescending but I am now quite proud because I look at my friends and they are still studying at college, with no practical industry knowledge and getting drunk every other night.
But at the same time, I am having a feeling I grew up too soon and am way too serious for someone my age. And that I didn't enjoy the care-free, stupid and young college life.

So the question!

Any redditors here who were as serious as I am at 21? What were your best achievements and proud moments - specially considering the mentioned age? What do you think of the "being too serious at 21" thing?

Can you summarize the given text in a few sentences?
<bot>: I achieved quite a lot at 21 and now I think I didn't enjoy my young age and I'm too serious. What do you think and how were you at 21?