Reggie Miller is one of the most interesting players to discuss. If you look at his basic stats, he is not particularly impressive. He averaged 18-3-3 for his career, made 5 ASG, and never made first or second team All-NBA (he did make 3 All-NBA teams). By comparison, someone like Carmelo Anthony has averaged 23-6-3 for their career, 10x All-Star and 6x All-NBA(including 2x Second Team All-NBA).
Yet people remember Reggie Miller as a great NBA player, a first-ballot Hall of Fame guy and an icon of the 90s NBA, why?
The first example is playing style; Miller was the first true three-point specialist who became a legitimate franchise player. He took more threes than anyone before him and made a great percentage of them. The subsequent future generations of sharp shooters would all be inspired by Miller, and he is an obvious candidate for someone from the 90s who would be better today, since the game would encourage him to shoot more threes and be more productive on the offensive end. In his most prolific season, he attempted 6.6 3PA per game. In the 2019-2020 season, that would have him 30th, the same amount of attempts per game as Marcus Smart and Terry Rozier; and we all know those guys aren't Reggie Miller shooting the ball.
The second key aspect is that Miller's teams were very good. 15 out of the 18 seasons Miller played, Indiana made the playoffs. They made one finals, and the conference finals on four other occasions. The Indiana team was consistently involved in the action during a popular time for the NBA, and arguably came the closest to snuffing out the Jordan dynasty of any team in that era, with Miller hitting a huge three pointer to force a Game 7. He had a flair for the dramatic and was one of the best shit-talkers of his generation. It also wasn't like those Pacer teams were full of All-Stars; Miller was pretty much the only star on those teams unless you count late-career Chris Mullin, up until Jermaine O'Neal blossomed. If his team always won, maybe Miller was actually better than his numbers would suggest.
An interesting stat for Miller is that he is second all-time in offensive rating. Offensive rating isn't a perfect statistic, but it does help Miller from being penalized by playing in the slow-it-down 90s era. His counting stats might not be as impressive as someone like Melo, but he was also playing in an era that was not offensive friendly. But Miller was probably an all-time great offensive player, he is 9th all time in Offensive Win Shares, ahead of Kobe, Shaq and Barkley.
Now, offensive rating can be kind of a misleading statistic, as role players who benefited from playing with elite offenses can have extremely high ratings. DeAndre Jordan for example, is third all-time. However, Reggie Miller was not DeAndre Jordan, he played almost his entire career as the only elite offensive option on his team. On a per possession basis, his offenses were consistently great. I think in a similar way to Curry's range and accuracy from deep warps the offensive spacing for the Warriors, Miller's ability to fly off screens and shoot with a frequency never seen before at that time, created a similar kind of offensive dynamic that allowed less-talented players to thrive.
