I don't send out too many transactions as I am more saving up everything. But when I do I mostly stick to around 0.0003-0.0005 BTC in fees depending on the priority. I think that's the real max I would pay for a normal transaction that I don't mind waiting some time for. If it has a top urgent priority, then I would probably double the fees.
the last transaction i made this day is sending the amount of 0.002 into my friends and i've see that the fee is about 0.00022 btc, i think its not a big satoshi depend on the amount we've send and its still in under than 0.001 btc for the fee. so i think its not problem for me because in the market exchange, i see that there are exchanger that applying the fee is something like 0.0005 btc itself when we need to send the amount of bitcoin and its makes me to think twice before i want to send into other wallet.