>>44616767RBGY are fine to play to see the series at it's roots but it's kind of rough but still playable. Either version is fine to play, I went with yellow.
GSC aged well and are a natural improvement and evolution to gen 1. This was the gen I started with so maybe it's nostalgia but these are peak of classic pokemon.
RSE, might as well just play emerald for the definitive gen 3 experience, very good. FRLG are good gen 1 remakes with some extras.
Above applies to platinum and gen 4 as well. HGSS being the absolute best remakes and peak of gen 4.