well, speed definitely is my weakness(too much of it that is!)and it is exciting in different ways depending on the type of vehicle.On 4 wheels the fastest i have driven was my 72 olds, which ran a 12 second 1/4 mile @125 mph and i white knuckled it to 152 mph for top end. On 2 wheels i would say the 78 kz1000 was the scariest adrenilin rush at 165 mph(never had enough time to look down for 1/4 time. For both largest and fastest thing on water I co-drove a 40' cat with twin supercharged 502 blackhawks and surfacing drives(2500 hp) @ 120 mph. Sounded like a jet and was scary to see something as big as a small house hit 60 in the 5 second range. I would have to say the most exciting ride(and addictive) was my 1998 yamaha gp1200 that I raced for 4 years. It wasnt the fastest top speed but when you take into account that it only weighed in @ 570# and had been massaged up to 210 hp, it was incredibly fun. It would hit 60 in 4 seconds and top out at 72 mph, but it could also make a nearly 90 degree turn at that speed as well! It would straighten out your fingers and make you lightheaded at the same time from all the g force it exerted on you! Like I said, I do have a predisposition for challenging the limits of machines for speed. My family has reminded me that I do need to survive to live another day but I am sneaking my old favorite back into the stable and tinkering on my capri! Long live speed!