1. Romanticism
The best (Wagner, Bruckner, Chopin). (But also some of the worst)
2. Modernism
Most creative and productive period in classical music history but I don't think it produced any absolute geniuses like the Romantic era did. At least there are no pieces as profound as Bruckner's 9th, Mahler's 10th, Parsifal, etc. Stravinsky isn't even my favorite composer of this era but he comes closest to the definition of "genius."
3. Renaissance
Amazingly beautiful music. This period is very long and much more diverse than is often recognized. Everyone but deprofundis underrates Renaissance music :lol:
4. Baroque
10% Glory, 90% click-clack continuo. The Glory (several cantatas by Bach, mostly the Actus Tragicus, and his masses/passions/oratorios) is definitely worth it though
5. Classical
I love Mozart but not much else