Yes, I think the first route is pretty important to me. When I start a new otome game, everything is still new and unknown, so I feel like the first route is when I can enjoy the experience the most. There's something really exciting about discovering the characters and the world for the first time.
That's why I usually play my favorite character's route first. I want my first experience with the game to be as enjoyable as possible. If I don't enjoy the first route, I find that my motivation to continue with the rest of the game tends to drop.