I think I've got 3 Royal Flushes to this day, but I've also witnesses 2 Royal Flushes live. One of them was against me in a Heads-up game lol - I mean what are the
odds of that? Luckily they got to showdown and showed me the bad news but I kept the pot small and didn't lose much. Plus, if I lose to a Royal Flush, I'm probably just going to tip my fedora and walk off into the sunset at this rare occurrence
Anyway, the op is asking for more about the 1st ever Royal Flush you hit if you've had multiple before. I remember my first Royal Flush well. Got it in diamonds. In my mind I remember thinking: so many people get the rare Royal Flush and then move all-in or bet big and the opponent(s) just fold. I wanted to hit my first ever Royal Flush one day and make sure to show it. My plan once I hit it would have been to just check it down to showdown like a boss; the psychology of slowplaying the monster hand and just wanting to show my first ever Royal Flush was worth more to me than any value I miss out on. Anyway, that was my idea - but it played out differently.
The first time I hit that hand was on the Turn when a King of the suit I was hoping for hit. I was out of position against a single opponent in the hand by this point and to be honest, I didn't even realize I hit a Royal Flush. My mind was thinking, "I just hit a King-high Straight Flush and need to get value from this huge hand." I think I bet out a three-quarter pot bet or so and my opponent quickly called. Then the River comes a blank and I move all-in. My opponent thinks a bit and calls. It was in that moment that I realize wait: I don't have a King-high Straight Flush? The Ace is here too? I have a Royal Flush! Guess I didn't play my plan of checking to showdown because I didn't realize I had a Royal until the end lol.
By the way, my opponent (the kind of player who has trouble folding decent hands when behind) had a set of Kings. Pocket Kings and the King that gave me the Royal on the Turn gave them the set; no doubt they would have probably folded to my Turn bet and certainly the River All-in if not for their hand. They were really cool about it though because they've never seen a Royal Flush in person either. Both of us took a picture of the board before the next hand - I should probably still have that photo somewhere
Anyway, yeah, that is my first Royal Flush story.