It is highly possible that I will be getting an E36 M3. (Unfortunately, that date is about a year away). I am aware of the OBDI vs. OBDII issue, but I will be looking for a low mileage M, so I doubt it will be a 1995.
Other than that, were there any years that are considered particularly good? Is there a year or two that had numerous problems and is generally considered less desirable?