The reward box at the Adventurer's Guild seems to give the Guild Ring if Finished Guild Quests are exactly 3 and doesn't seem to give the Ring if above that. (Enjoying the game by the way! :D)
Edit: The Seaside Blacksmith fellow doesn't give me the Stellar Fire Essence after I gave him the Pretty Flowers
Edit: Aqyl seems to give tonic or stimulants for free since he doesn't take my Heratali Coins, as long as I have it, I can get them for free! (Infinite Power! XD)
Edit: Cave Ruins - Out of Place, opening the Magic Door plays the door opening animation but doesn't transfer me