Just for fun, to see how velocity related to strikeouts, I did a study on this about four years ago when I took the top ten strikeout pitchers from both leagues over a three season period from about 2003-2005. Best I can recall, around 85% of the leaders were guys who could dial it up to 93+ mph.
Of course, if you look at the wildest pitchers, they tend to possess higher velocity as well. That makes sense, because usually a guy with average or below average velocity usually would never make it to be bigs unless he had decent control. It goes without saying that the guy who can throw 95+ gets more opportunities to succeed than the guy with 88 mph velocity.
It's all a matter of preference. Me, I enjoy watching 97-99 mph fastball pitchers rather than guys who nibble the corners with junk pitches.
I remember hearing hitters describe a Tom Seaver fastball. They said that his fastball appeared to "explode." That was due to the fact that as it approached home plate, it was so fast that the batter's eye couldn't focus quick enough and the ball appeared to come apart. It was an optical illusion. I'm not sure how Seaver's fastball rated, but I always assumed he was in the 92-93 mph range.