Just stuck down my first set of ceramic tiles in the bathroom. I can't tell if I mixed the mortar correctly, I don't know if I used too much or too little under the tiles, I don't know if the tiny misalignments between tiles will show up too much, and I don't know if that one tile sitting on a hump will wobble once everything is dry.
The pessimistic side of me is saying I'll be spending my 40th birthday ripping up these tiles and starting over.
But I think I'm not going to be paranoid about it. Tiling isn't exactly brain surgery.