I think the LIs' designs are more important to me - it's what I'll be looking at for most of the game, after all! Although I still care about the MC :)
I am playing Reine des Fleurs! I really wanted to play it for a long time because it looked so beautiful. I am half-way through the game and while the plot isn't always the best, I'm still having a good time :)
Art style is incredibly important to me. I probably won't buy a game if I don't like the way it looks.
Sometimes I feel really bad because of this because I rarely pick up Western otome :( I just don't like their styles most of the time.
I usually play them but I might not 100% them.
I like it when they allow me to spend some more time with my favourite characters but there are also some that I just don't care about that much..
There are a few that I like but I mostly avoid them. Art style is really important to me when playing otome games and I feel like a lot of Western games have a style that just doesn't click with me :(
I feel like most of the games I've finished weren't all that long. Maybe about 30-40 hours? But I suppose that depends on your definition of long.
Jack Jeanne was the longest one for me, simply because I kept coming back to play a few of the songs :)