I've played all ranges of buy-ins, up to $100 HU.....and the donks are still there. I thought that if I played higher stakes it would be better.....well they are just donks with more money.....I just try not to get involved with big hands until I can pinpoint the donks at the table and know when to play a big hand....that doesn't always work because those donks get a good hand every now and then, but it works most of the time....