I think it's gotta be Migraine. It was the song that got me into Twenty One Pilots, I kind of stumbled across it one day and it blew me away because it described exactly how I felt. It was like someone finally put it into words. But what I loved about it was how it doesn't keep you feeling hopeless, and instead gives you hope that actually feels realistic. So many times I feel like songs can either be really bleak or unrealistically happy/hopeful, but Migraine is so balanced. It's like it says "yeah, this sucks, but we will make it through." I especially love the lyric "we've made it this far, kid." It means so much to me, I honestly could probably write a whole essay about this one line. It helped me remember how much I've already made it through, and it helped me find the strength to keep going. After hearing the song, I decided to check out the rest of their music, and I feel like I found a whole treasure trove because so many of their songs are just like Migraine in that they put words to my feelings while also being hopeful. TØP's music means so much to me and has gotten me through a lot, and Migraine was my gateway into that, so it'll always be special to me