While I'm biased towards the Eastern Hercules Beetle (Dynastes tityus) because I've owned one and it will forever be my beloved, my favorite in regards to yap about will be anything in the Order Strepsiptera! They are such mysterious little parasitoids that I even did one of my senior research papers on! Photos pulled from Wikipedia with OP's credit!
Herc Beetle: By David Hill - xIMG_0258, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=41175425

Strepsiptera: By Dongmin Keum, Kyung-Won Jang, Daniel S. Jeon, Charles S. H. Hwang, Elke K. Buschbeck, Min H. Kim & Ki-Hun Jeong - Fig. 1: Natural Xenos peckii eye and the biological inspiration for the ultrathin digital camera. in Dongmin Keum, Kyung-Won Jang, Daniel S. Jeon, Charles S. H. Hwang, Elke K. Buschbeck, Min H. Kim & Ki-Hun Jeong: Xenos peckii vision inspires an ultrathin digital camera Light: Science & Applications volume 7, Article number: 80 (2018), CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=124543451