Basically downloading various different alt coin wallets and eventually getting my bitcoin stolen from a virus from one of the wallets still to this day I dont know which one it was
That is a new mistake I read. How much Bitcoin did you lost from the virus/Trojan program? Have you listed a list of wallets you downloaded in the Altcoin Discussion forum? It may help new Altcoiner to stay out of the program.
My biggest mistake was to store 0.6 BTC on MT.Gox. It is not that much compared what others lost, but it was 1/3 of all my Bitcoins some years ago. Iit was a mistake I learned from.
How much do 0.6 BTC worth at that time? Good that you did not put all your Bitcoin into one exchange. You learnt that you should split you Bitcoin between multiple wallets and exchanges.
my worst mistake was always being too emotional when it comes to trading. which have always made me make irrational decisions which turn out to be wrong and cost me money.
One of my mistake too. When I was day trading at OKCoin, I keep buying/selling at the wrong price because I am afraid that I would lose my Bitcoin.