Yeah, I also got to play through Black Mesa as my first ever HL1 experience last year! Very cool, although uh... not especially balanced for controller, VR evens the scales a bit, which is why I waited for the Steam Frame rather than playing them back to back.

I'm finding the experience pretty interesting. The game is great, ofc, but I'm finding VR affects it in a few ways. Firstly, way scarier, I have a visceral "hell no" reaction to head crabs here that I didn't in Black Mesa. I'm also finding some of the puzzles much harder for whatever reason, I think because of the sense of scale and immersion. Need to put more thought into exactly why that is though. Gunplay is dramatically better than it was on a controller, ofc. I still need practice, but I can pretty reasonably go for headshots now and aim fast enough for head crabs.

All in all, solid experience, eager to finish it. I've got a lot of story questions and such too, which is rad. I must be one of the only people playing HL2 spoiler free around. Also eager to play Alyx too, ofc, and see how that differs in that it's designed bespoke for VR.