Why do I keep playing this?

I must have put 20 hours in to Etrian Odyssey by now. Still it feels like I have gotten no where, Im only on the 4th floor of the dungeon. I must have gone through those same four floors a hundred times by now. Each time getting a little bit stronger and being able to explore a little bit further.

This game really is the ultimate grind and thats all the game is, grinding. No fancy story, interesting characters or impressive graphics. Just me watching my characters slowly grow stronger while battling the same enemies over and over again. Its kinda like watching paint dry. Still I keep playing it and I actually get excited when I after half an hour is rewarded by getting to allocate one (one!) skill point. Im almost ashamed of admitting to enjoying this game.