Well I thought that this would be a fun thing to discuss. Feel free to share any of your funny, weird, or memorable experiences while playing Fire Emblem: Awakening.
On my first run, I didn't really understand the concept of Second Seals and I just used the Master Seal to upgrade my characters to their original classes (Grandmaster for Mu, War Cleric for Lissa) without reclassing once.
Also on my first run, I accidentally let Severa die because I spoke to her with Chrom and I thought she was already recruited when she died. I accidentally saved as well so I missed out on Severa.
Feel free to share your experiences as well.