I setup my own business during my second year of university (while on a 6/7 year course).
I setup when the economy and the country I was in was booming and within a couple of years I was making some real money. I then got involved in other business and all was going well until the economy crashed which killed off all my business interests. I got rid of my cars, watches, flat....
I finished university and tried to work in a normal job however I quickly found it was not for me, I should have never gone to medical school but its too late to turn back time now. I missed the freedom that being self employed gave me, the crap money and the fact that I had no life did not help.
So I started again from scratch about 2 and half years ago, we (a friend an I) started developing a M2M/Telematics product which we are now taking to market. Its not a new product or concept but there is a huge market and we think it will do well.
Running my own business fits my lifestyle very well, I work all the time from the moment I wake up to when I go to sleep, at dinner, when I am out with friends, 7 days a week. I often wake up in the middle of the night to get onto TC's because my partner is based in the US and our staff are based in India however I love doing this. I meet lots of different people, everyday is different and I travel a lot.
I am lucky in that I saved a little during the good times and my wife makes enough for us to live on which has allowed me to take some risks and also allowed me to go through a long period of time not making much so I dont have the sleepless nights that many business people do.
However I have seen the other side of the coin, a very close friend setup a retail business 6 or 7 years ago, he had a good well paying job but left to start his own business. He has not made a penny and lost over half a million pounds which has caused him and his family no end of stress.