Iv ridden busas, blackbirds and owned a few zzr11s, Iv also ridden and owned various 600 super sports and apart from the straight line speed the 600s were far more fun to ride as you really need to ride them, get the gear changes right etc,whereas on the big bikes you just use the throttle, don't matter what gear your in at what ever speed you just open the throttle and things get exciting REALLY quickly.
That said if I was to only be able to have one bike I'd go for a litre plus bike any day of the week just for that sicky scared/excited buzz you get from a litre plus bike when you red line it in every gear.