- Genre-Defining Experiences - The original PlayStation was the most successful console of its era at a time when video games were literally entering a whole new dimension of possibilities. Considering the limitations of computing at the time and that 3D game design was basically uncharted territory, it's amazing how well a number of developers were able to make the transition and provide experiences which helped to establish genres as we know them today. For example, the 3D action platformer was established during this time with titles such as Tomb Raider, Ape Escape, Spyro and Crash Bandicoot, and games in this genre have retained most of these foundational elements since. Racing games such as Gran Turismo also play nearly identically to racing games from the PS1 era, just with more glitz and polish. Tony Hawk's Pro Skater was also responsible for establishing the skating game genre, which would be hugely popular well into the PS3 era. Survival horror was really established on the PS1 with Resident Evil, Dino Crisis and Silent Hill, providing an experience which is almost entirely exclusive to the PS1. These are just a few examples, but it just goes to show that the PS1 was a key foundation for gaming as we know it today.
- CD-based Format - In a time when cartridges were the go-to method for game storage and when CD players weren't particularly common, the PS1 showed the value of multi-media storage formats. Having game's played on CDs was a huge benefit for a number of reasons: they were less bulky, cheaper and could store far more data than the competition and they allowed PS1-owners the freedom to use the system as a CD player when they weren't gaming.
- The DualShock Controller is the Granddaddy of Modern Controllers - The title pretty much says it all. While the original, analogue-less PlayStation controller was basically just a refinement of controllers of its era, the DualShock set the new standard which has been replicated in all future controllers since (barring gimmicks like the Wii of course).
- Easy to Pirate For - Sure, this wasn't exactly an intended feature, but with the cheap proliferation of CDs, the PS1 was notoriously easy to pirate games onto, a "feature" which has only gotten more valuable in the years since support for the console has died. It was also fairly easy to modify the system, such as replacing parts in order to circumvent the system's region locking features.
- My Favourite PS1 Games - Obviously this isn't a comprehensive list of good PS1 games, but the games that I love and grew up on include Ape Escape, Metal Gear Solid, Twisted Metal 2, Vigilante 2: Second Offense, Future Cop: LAPD and Driver.
- Janky Gameplay - The jump to 3D gameplay was a new frontier back when the PS1 came out and while it's impressive that there are some seriously good games in this era, nearly every game from this era feels incredibly dated and incredibly clunky. Between the low-res graphics, janky controls and (especially) the wretched camera controls that defined nearly every game from this era, it's really hard to go back and play a significant number of games from this era.
- Original Controller was Outclassed by DualShock - The original PlayStation controller was fine, but when the DualShock came out it controlled so much better and made the original controller completely obsolete. The fact that the PlayStation One Classic came packed with the original controller was a baffling decision on Sony's part, because not only was it inferior, but it also meant that huge games like Ape Escape could not be included. The lack of analogue sticks on this original controller also did not help with the camera issues which plagued this era's games and wouldn't really be rectified until midway through the next console generation.
- Hardware Limitations - The PS1 had some really annoying hardware limitations, even compared to its competition. Memory Cards were a particular annoyance, the official ones only had 15 blocks of memory if I remember correctly, but some games would take up multiple blocks so you would fill them up very quickly. You could also buy unofficial cards, but I had one knock-off which corrupted and actually managed to ruin one of my discs! The PS1 also required a multitap if you wanted more than two players at a time, whereas the N64 could have four players at once. This was unfortunate and really cut down on the potential for local multiplayer games such as Vigilante 8: Second Offense.