OKGO: They are a super visually artistic band (Seriously check out their MV's) and it was a pretty small venue so it felt personal. It was my first concert I've ever gone to and it was amazing.
St. Vincent: Her voice and guitar together in a live situation was like magic, it was a standing venue and my legs got tired, but it was worth it just to see and hear her performing in real life.
Honestly I haven't been to many concerts, both ones listed above took place last year: 2017, and other than them I've only been to one other which was Day6 (shoutout to MYDAYS!!) So I wouldn't consider myself much of a concert goer.