most i quote and do are travertines mike. a few quarries and a few terra.s, then behind them are woods and laminates, most ceramics can be cleaned by the owner, its the grout they struggle with. i'd say around 25% hard floors for me are ceramics and out of all the ceramics, there has only been one that was a dirty tile (and not the grout lines) that needed cleaning, one of them textured ones that even i struggled to get the crap out of, lol