FPS enjoyers, which was the greatest era? (and why)

[HoloDust]

I'm partial to 90s, due to how FPS games had lot of exploration elements in their level designs, which started to disappear with later "cinematic" linear corridor shooter approach, which was, from my POV, very detrimental for the genre in the long run (luckily, there were still games in 00s that preserved that sense of exploration and later linear wide and open world FPS games made up for it to a degree).