When the That Guy player comes to the table with a character he "rolled at home" with nothing but 16s, 17s, and 18s
Rolled a character for a one-shot (using a bot on Discord) that got 18, 16, 16, 16, 15, 13 once. It felt like cheating.
That being said I really enjoy playing a character with one really bad stat. Like 5 or 6.
You did have that 15 and that 13. To That Guys, that's an unbearable flaw.
The min is the fun part though, you gotta balance out those high stats with lows. One of my favourite characters I've played was a sorcerer who was dumb as a brick and thought he was a wizard, since he could cast spells and knew wizards cast spells, therefore he was a wizard
I remember back in the day of playing the original gold box Pools of Radiance - you can build your party of six characters - and it has a stat rolling generation method, where you can just roll over and over until you get stats you like...
BUT... at level 1 you can "customize your character" which lets you just manually assign stats (I think the idea was so that you could re-create your tabletop characters in the game.) - but as a kid we would always just set every stat to 18 with it.
I did the same thing with the Buck Rogers gold box computer games. They were hard enough even with maximum stats.