Played a little of Half Life 1 for the first time(not counting Black Mesa). Graphics are better than I expected, looks better than NOLF...and possibly on par with Deus Ex, if not better. All the scientists look the same. I can't even tell if any of these guys are the main characters from HL2. I only have the crowbar and pistol at the moment. Compared to HL2, the crowbar seems worse, but the pistol is much better. I actually enjoy using the pistol here.
I can't seem to get used to Gordon's movement. He moves a little too fast for my liking, especially when I'm trying to do small movements for first person platforming or going down holes. Oh well, it'll probably just take some time to get adjusted.
Overall, pretty surprised how little has changed gameplay wise. I recently played some Shadow Warrior and Duke Nukem 3D, and HL1 definitely seems more modern.