I haven't bothered with mods for years now but Neotokyo was by far my favourite. Apparently it's still played to this day by a group of fans but I haven't joined in. Also the soundtrack is amazing
What happened? I remember the launch and everyone was raving about how good it was. Personally I thought the gameplay looked very shallow and didn't bother trying it.
It's a close call between Super Hang-On, World Rally and Colin McRae 2.0.