The most brutal DD I has was a modified 944 turbo. I didn't have much money at the time, so just kept it together the best I could. The power steering didn't work, AC didn't work, had basically race suspension that was crazy stiff, one summer the heater stuck on, and it was so low it basically plowed snow in the winter. I don't want to do that again, but I would DD a newer 911TT with PDK all day long.
My current DD is a v12TT CL600, which is very uncommon around here (Nashville area).