My worst was an Xcel front zip. Super hard to get in & out of and within 4 months the front neck ripped and became a V-neck. This was their top of the line wetsuit at the time too. It completely fell apart halfway thru my 2 season.
My best was a 3/2mm Jetpilot "Cause" fullsuit. Warmest, stretchiest, most comphy wetsuit ever. 2 full seasons with it before it started to thin out. I don't think they make it anymore.