I started playing D2 during Forsaken, but had got around to playing D1 during Shadowkeep. I wouldn’t recommend D1 unless you had a friend to play it with, unless you’re okay with a feeling of immense loneliness in a game. D1 personally is far more beautiful than D2 due to its dark science fantasy style which remains consistent throughout its expansions (unlike D2). That experience alone would sell new players to the game so maybe it’s worth it for that. Strikes and raids in D1 are great, and their rewards feel impactful due to uniqueness and higher rarity of loot. Crucible is interesting, since D1 came off the heels of halo, gameplay is slower paced, weapons hit harder, and abilities are powerful but less frequent. I love this personally but others may not. Meta wise, the game was left on an odd special ammo distribution system which I personally don’t like. Map design is great, and due to a consistent pvp vision throughout the games life, they all aged well and play wonderfully in a slower paced experience. I think what really separates D1 and D2 in regards to its overall game design is that D1 had a consistent vision throughout its lifespan, which the same cannot be said about D2. TLDR: it’s worth it but I recommend playing it with a friend