I first read ParaKiss when I was around Yukari's age. At the time, I couldn't understand why Yukari wouldn't run away with George. I had this childish notion that you should get married to your "soul mate", and even upon a second reading over 10 years later, I do still think they were soul mates. But George was right: Yukari made the right decision.
That person who brings out the best in you, who sets your soul on fire, they're the person who changes your life and leaves an indelible mark, but they're not exactly the kind of person you can grow old with. No, not Yukari and George. They were too alike--that was part of the reason why their union seemed like kismet. George was passionate about Yukari because she allowed him to be his best at the thing he really loved. Yukari loved George because he helped her to discover her own identity and find her passion. They needed each other when they had each other, but to grow into their fullest potential they needed to take separate paths. I see that now.
I have nostalgic feelings for this manga because it was one of the first I ever completed, but for its time it was bold and progressive--you know, it still is. The message of furiously pursuing your passion is really inspiring, even to this jaded obaa-chan. It's a story that captures that elusive time on the cusp of adulthood full of change and high-charged emotions and excitement and possibility.
It lives up to the hype. I think this is Ai Yazawa's best work.