Where would you draw the line?
My view of the situation is as follows.
1% - 2% (maximal) is extremely ideal - ideal and slightly more realistic, with an annual turnover of around 10%.
2% - 5% (maximal) is ideal and slightly more realistic - manageable and much more realistic, with an annual turnover of around 18% - 23%.
5% - 10% (maximal) manageable and much more realistic - not very worrying but psychological limit, with an annual turnover of around 30% - 50%.
Getting 30% - 50% a month doesn't seem too realistic, not that I would necessarily complain, but one would have to wonder where all that money is coming from.
I know I would be concerned with the conditions of global markets if I was making that much a month.
For me the DD is less important than the ration against it profitability, i.e. A drawdown of 1% can be awesome but not if it's making 2% yearly, A drawdown of 20% can be not good but it will if it's making 1100% yearly. I think the most DD I would ever accept is 40%, after that you have to give me at least 25 times my initial investment yearly.