the 328i is a great car. I love mine. It has a great balance of handling, power, and fuel economy. In terms of trouble areas, I would say that if your buying one with 90k+ to look out for emission-related check enline lights. Also with almost all E36, the rear strut mounts and bushings.
What to look for: Id say go for a sedan in my opinion. As long as you get the sport pkg, you will have the convienince of 4 doors, and it doesnt really weigh much more. Def. get a 5-speed and sport pkg. cold weather and lux. are nice, but sport is needed! feel free to PM me or send me an im.