This may be quite unfair but I really want to rate this show based on all 3 seasons and I am going to do just that.
~~ This is based on my experience after watching S1,S2 + S3 ~~
Where do I begin? Ah. Nodame Cantabile is one of my favourite romance series and that being said, I do watch a lot of romance anime and although I do love the typical 'love at first sight' sort of thing - let's face it. It doesn't always happen in real life and Nodame Cantabile shows love in a realistic setting.
I personally love the "find someone who makes you a better you" type of romance because a good partner will always make you a better type of you and in Chiaki x Nodame - it was beautiful. We see the two of them mature as they move along from one stage to another, facing difficulties and learning to accept one another's flaws. It takes a lot of work and that's reality. And I love romance animes when it's real.
Love is a really funny thing. It's really difficult to interpret but I always find that small things really do matter. It's not about the big things that couples have to do - it's the small things that people normally don't really care about.
For example, Chiaki constantly taking care of Nodame - cooking for her, cleaning her room and laundry, etc
That to me, is love at its simplest form.
If you enjoy a series filled with funny characters, amazing classical music and slowly developed romance - then this is definitely the show for you.
It's really a hidden gem.