/vr/ - Retro Games

Hello friends, idiot newfren here.
Played a shit ton of Doom when I was a kid and over the past year or so I've played a shit ton of Doom again. Right now I'm doing a very casual UV playthrough of the first game while trying to get all kills and secrets blindly, after which I look up a YT vid (usually decino) and then re-do the level. Soon I'll be done with E3.

Seeing how then I'm only one episode away from beating the game fully, I have a few questions
>should I play Sigil, Doom II, TNT or Plutonia next?
>I own Doom/Final Doom/Ultimate Doom/Doom II on Steam. Does this complicate or simplify things if I want to try out wads and mods made by others?
Thanks in advance!