Excactly wizzard, surely better to bend the skids/colapse the seats/ whatever back on the pad than cartwheeling down a back alley?
blade root, I assume you're talking about over CAT A weight limits as opposed to airframe weight limits?
I've been surprised myself by being with pilots in the reverse situation, skimming accross rooftops in order to gain airspeed rather than gaining altitude over the spot when over Cat A weight limits.
Depends on the individual situation of course and if the takeoff area is not too congested then would probably go for airspeed, but congested areas, particularly if there are other human beings around, would definitely go for a CAT A profile to crash me back on the pad.