6th Symphony of Tchaikovsky

Is this work full of emotional depth or just a lot of sentimentality?
Or is it both?
Is it neither?
The first movement is around 20 minutes long. It has some tremendous melodies and some real drama. It is the sort of music I can lose myself in. I could imagine myself in a snow covered palace in St Petersburg, or beside a beautiful river on a sunny day.
It's not serious like Beethoven or Brahms. It's not solemn like a lot of Bach. It's not elegant like Mozart or Haydn.
But at this time of year it fits my mood exactly. Which begs the question whether the purpose of music is to fit your mood. Or to alter it. Or to enhance it.
Or none of the above.
In the meantime I look forward to listening to the 6th again.