Some OBDI computers have leaking capacitor issues in their ECU. I can't remember what year this was fixed, but I believe it was 1995. OBDII is better at self-diagnosing, but that's because it has more components to it. More components means more things that can go wrong. So, it depends on if you're a "modern technology is sweet" kinda guy, or a "keep it simple stupid" kinda guy. I personally like some of the features OBDII gives - being able to plug in a scanner and tell what the computer's thinking & seeing live can make some parts of troubleshooting a breeze. And, I prefer to avoid ECUs with known problems... I can't fix that kinda problem on-trail... or, at all for that matter.