Wood floors are warm and classic. It can get scratched or take water damage but you can always strip and refinish it (even a different color if you're in the mood) or remove it relatively easily.
Tile floors are cool and and hard. If you drop something breakable on tile it's pretty much toast. Tile floors will take a great deal of abuse but the grout can get (and remain) dirty and once you pick a color you're stuck with it.
Really, it comes down to personal preference. Some buyers will prefer wood. Some will prefer tile. Cost wise you will put out a bit more for hardwood.