I remember back in the early RBY days, I had nobody to trade with, so I always ended up with just a Graveler or Kadabra and they could never reach their final stage, which was really frustrating to me. Then Stadium came out which allowed me to trade between cartridges, so I liked them a lot better after that. And now there's wifi so it's not really a problem.
My favourite by far is the Gengar line. I find it very powerful, and I really like the designs too. None of the other appeal to me too much, though I'll admit I got a lot of use out of Kadabra/Alakazam back in the day and occassionally used Graveler/Golem. My least favourite line is Machamp. I've just never cared much for fighting types or their designs in general.
My favourite by far is the Gengar line. I find it very powerful, and I really like the designs too. None of the other appeal to me too much, though I'll admit I got a lot of use out of Kadabra/Alakazam back in the day and occassionally used Graveler/Golem. My least favourite line is Machamp. I've just never cared much for fighting types or their designs in general.