:D Did you see my user profile video and user title? Yeah, I really really like Ar Tonelico. I rented the first game and got half-way. I had forgotten to rent it again and now I can't really find it recently to finish.
I've played 2, but I haven't finished it myself. See, I have an older sister that is also interested in games. I'm interested in the story so I've watched her play whole games and not touched it and my knowledge is complete of the game.
I started out playing Ar Tonelico 2 until I saved before I picked the Cloche route. My sister started her's off my save file and went the Luca route and when she got father...I kinda lost my will to play again as it felt redundant.
I think you'll really enjoy the first! The cosmosphere is as deep, but sometime in 2 it felt like they lasted forever, 1 isn't as bad.