I like playing %33 and triple when lost. It does end your bankroll quickly in a hurry if it goes bad in a row but it also makes good return if it goes well.
Doesn't every strategy make a good return if it goes well?
Absolutely not! Classic martingale makes a ridiculous return of just a base bet. It doesn't matter how many times you double your bet (at 49-50%), even though you may win in the end (which is not given as, I hope, you understand), you just recover the amount lost in the previous steps and earn only the amount that you started with (that is the base bet)...
Well the key part of that statement is "if it goes well". If martingale "goes well" you make a great return. It's not that you just recover the amount lost, it's that every time you don't lose it all, you win.