It's large enough for me to have to deal with the psychology of a losing trade, but small enough not to have to worry about liquidity. I'm trading Forex so it would have to be many times the size before I need to worry about that. I'd prefer not to disclose the amount.
I made $7,000 on $8,000 because I am comfortable with a lot of risk. I will probably give that all back today, however.
+188 % for 2011 on a small account. Gold killed me after Aug. or it would have been 4 times that. Profitable 3 of last 4 years. If I correct for taxes and other charitable giving, the account is up 375% over the last 4 calendar years. Currently have option positions in Euro, Gold and DJIA. Make about 3-5 trades per quarter.