Probably a sea turtle. Was snorkelling in Malaysia, completely obsessed with the coral and all of the fishes, when this massive turtle just cruises by. Held my breath for as long as I could to swim next to it, not too close but just wanting to be in its presence, it was so calm and majestic as it headed out into the deeper ocean
I got an analogue watch instead of the cool futuristic digital watch I wanted, so I cried. After reading the rest of the responses I feel very very fortunate