the original MGO from MGS3 was so good, that was literally all I played along with Monster Hunter when I got my PS2 Ethernet adapter
I played both the first and second version, and I loved them both. The stat progression in the second version was enjoyable IMO. To date, it’s probably one of the online experiences I have the fondest memories of.
There are people out there who are running dedicated servers for MGO1 and MGO2.