My First Applique - and I have questions!

[sewmuch2learn]

Scraps from Go Pink and Christmas combined for my first applique wall hanging. The hearts are pretty stiff because I used something I'll call "two-sided sticky iron-on stuff" I found in my cabinet. I'm going to practice my FMQ again, but I don't know if I should quilt over the hearts or just around them. Any experienced advise will be very welcome!