It's true, it takes a special understanding and experience to really be able to comprehend what classical music is. What it is is an expression of emotion - it's art. Just like paintings, poetry - music is art, and classical music is quite an unconcealed, raw-emotion art form.
Over the years since I've become a musician, I've come to know and understand classical music and the art form more. It's just amazing!
I used to hate opera - I didn't understand it. Now, I've come to understand it more and I absolutely LOVE opera! I'm currently working on a Rossini opera clarinet solo piece - just beautiful.
I'm also very into piano solos, and I'd have to say Chopin's Nocturne in C# Minor gets me going every time. Nocturne in E-Flat major is also very nice, and Valse op.69-1 "l'adieu" brings wonderful images to mind. Albeniz's Tango is also a favorite, I'm working on that now.
Anyways, I'm done. I could go on for days talking about this stuff