Nothing to do with Grumpy but... I still mow my first ever client.
She is now 85, has 5 great grandchildren, has never missed buying my kids an easter egg and a candy santa every year until they left school. Every year I get handed a bottle of bubbly (Spumante..yech) for the wife for xmas and tin of shortbread for me. She's currently knitting booties for my first grandchild.
Have had her lawn for almost 23 years and upped the price twice from $20 and now charge $30.
Who cares about the PITA's. These sorts of customers make all the crap jobs worthwhile