Both Klitschkos fight tall, but in different ways. Wlad is much more mobile and fluid, while Vitali is more aggressive and durable. There is a saying that no plan in combat survives first contact. The same is true for fighting the Klitschko brothers.

Vitali and Wlad are both technicians in the ring, and both hit very hard. I'm sure everyone that has ever set foot in the ring with them has come in with a plan to exploit the vulnerabilities you see, only to abandon that plan once their power and trip hammer jab was felt. It takes a unique/rare mentality to feel that kind of physical strength and power and ignore or overcome the survival instinct to force the type of fight necessary to overcome technically and physically superior fighters like the Klitschko brothers. You may not like their styles but you have to give them their due for their dominance of the division.