I know lot of names and pieces in this thread.
But I don't see here one name who made me love classical music - czech romantic composer
Antonín Dvořák.
I think I can recommend him. His symphony "From the new world" is very famous, it was my first CD with classical music
Slavonic Dances, String Quartets, Concertos for cello (B minor) and some other pieces are also very nice music.
Antonín Dvořák - Last.fm
Antonín Dvořák - Wikipedia
Part of symphony "From The New World" - my loved Largo