Of course you fucking do, because they are a delight.
I am in particular obsessed with the wonderful music Joe Hisaishi writes for a lot of the films (Nausicaa, Totoro, Princess Mononoke, Howl's Moving Castle, Spirited Away, Ponyo, Kiki's Delivery Service, Porco Rosso). So I am going to share with you my favorite thing: behold this lovely concert from the Studio Ghibli 25th anniversary. I have watched this probably two dozen times since I found it - I just put it on to keep me company when I am working or cleaning or laying around. It really brightens your day.
There is a screen behind the orchestra showing clips from the movies as they play songs from them, a freaking adorable children's choir, an amazing opera singer, and at one point a high school marching band even comes through the place. Oh, and Miyazaki singing the Totoro song for a moment. I defy you not to get the Ponyo song stuck in your head.