I play manually even if my bet size is just 10 cents, exactly because it is much more fun than playing AUTO. There are 2 exceptions, though, Mines and Crash. If I play them manually I can never get higher than 10x reward because I can’t resist the urge to cash out when the milestone of 10x is crossed. With auto mode it's easy: you just watch and wait until that 1000+x is achieved.