Tile is often recommended with newspaper or some sort of substrate covering it. Tile has zero absorbency so the mess spreads out further and the dragons run through it, easily smearing themselves. It's extremely unsanitary and you would need a gallon of chloro a week for the tiles and daily baths to clean the dragons! Tubs are very easy to clean but bp owners still line them with an absorptive substrate such as newspaper or aspen.
I concur with the classic 3 beginner pets: beardies, leos, and corns. You really can't go wrong with any of them. If a single beardie is really too much work and a pet rock isn't appealing, I would suggest a Beta fish which probably has the least onerous upkeep of any animal.