Here's some Doom shit. Some of it's old, most of it is fairly new, but it offers a pretty good idea of where I stand with a lot of the fun stuff.
Doom - E1M4
I was able to SR40 onto the ledge to do an early yellow key grab. I don't know why I never tried that before, it's actually pretty easy.
The exit pit jump (which obsoletes the early yellow key grab strat) was a bit beyond my reach. I don't know if my angle was off or if I just couldn't gain enough speed. That's the largest jump you can clear with an SR50 run, so it could be either one of the above.
Doom - E2M6
The void glide on this map was my first time actually nailing a glide in Doom. I'm not particularly consistent with it yet, but I was able to set a 43 second PB by combining a lucky setup with a quick exit switch press (pressing the exit switch from the void is a lot harder than it sounds).
Doom - E2M7
This is the big one (for me, anyway). It took me about a dozen tries but I was able to nail the rocket jump to the exit that skips, like, most of the level. I practically squealed when I managed to pull this off.
Doom - E3M6
Managed to set a PB of 9 seconds time to get to the secret exit by pressing the exit switch through the wall (3 seconds over WR, which is like an eternity for a map this short, but I was pleased to get sub-10).
Doom - E3M7
I haven't played this one all that recently, but I crushed this map at the fall Extra Life marathon that my friends held. Obviously not a 110% optimal run, but it was a fantastic footnote to an already solid (by my standards) episode 3 run. Managed to get all of the major skips on the first or second try and (I think) managed to make a labyrinthine map look reasonably straight-forward.
Doom - E4M1
Well, first of all, I managed to do a UVMAX (Ultra-Violence, 100% kills, 100% items, 100% secrets) clear of this map. If you've ever played this map you'll know why that's noteworthy. If not, look it up on YouTube. Fucking yikes.
Secondly, red key grab. Not too difficult, but a little tricky to do quickly while under fire from a bunch of hitscanners.
Doom 2 - MAP06
The jump at the beginning is a bit tricky, but being able to single cycle the blue key is satisfying as hell.
Basically, instead of just riding the lift down into the titular crusher, run at an angle to the left. If you pick up enough speed and get your angle and positioning right you can slip through the bars and make an early jump to the switch that lowers the blue key lift. Hit the switch, rush to the lift that has the blue key, SR40 across the nukage, then jump on the elevator back to the beginning area right as it's about to go up. Fuckin' love it.
Doom 2 - MAP13
I was able to do the blue key grab. A bit finicky but I eventually managed to get a pretty comfortable setup down for it. Basically, you SR50 into the door that the blue key is behind and your character will push into the wall enough to grab it. Harder than the red key grab in E4M1 but nothing too noteworthy.
Doom 2 - MAP16
Pretty straightforward glide into the exit. This skips the red and blue keys and makes a fairly rough map fairly easy.
Doom 2 - MAP18
Managed a 30 second UV-speed (Ultra-Violence any%, pistol start) time on this map. Really fun to run, not quite as much fun to play through casually.
Doom 2 - MAP19
Managed to do the blue and/or yellow key skip by doing a guideless glide through the end gates. This is the video clip that I linked earlier in this thread.
Doom 2 - MAP21
I managed to (after a lot of attempts) do a keyless exit on this map. The glide through the yellow key gate is at least guided, but it's made a lot tougher with everything shooting at you.
The blue key door skip is easy enough that I'd pretty much been doing it since the game came out (seriously, you just walk against the corner and if your angle is even close to correct you'll just walk through the gap. That's it. I don't know how they didn't catch that).
The red key skip was...rough. I'm not too sure about the exact technical details behind this, but I have a feeling it exploits the same things as E2M6's void glide. Basically, you have to push through the blue gate, glide between the blue and red gates, jam yourself into the corner, move in such a way that your weapon moves like you're running at full speed, then fire a rocket at the blue gate. I think that does one of two things: it either pushes your hitbox across the teleporter linedef that leads to the exit chamber or causes the entire player object to move enough units in one frame to bypass collision detection.
Regardless, I managed to do it after about 40-50 tries. Felt good, man.
Doom 2 - MAP22
Managed to do the blue key skip (a glide between the bars in the northeast wing of the map). It's not too difficult as far as glides go, but it's really awkward due to how they're angled.