What a difference one extra tooth on my rear sprocket made.
Although I really liked my bike when I got it, I didn't like riding it in the city. I always used to feel like I was pulling away from traffic lights in second gear, and that meant I had to work the clutch a lot more than I wanted. Since I use my bike for getting around on, besides weekend rides, it made local commutes a hassle. Since I needed a new chain & sprocket, I asked for a rear sprocket with one more tooth.
Now, riding in the city is much easier, since I don't need to work the clutch as much. Also, when I'm riding in the twisties, there seems to be more bite to the throttle and it feels more responsive to the slight inputs I give it. Cruising on the highway, I feel like the bike revs about 500 rpm higher than it used to (but I forgot to write down actual numbers before the sprocket change, so I don't know for sure) so the bike sounds like it is going faster, even at the same speed I usually ride (more fun, less tickets). I also found that top gear roll on passing was easier, and I didn't always have to drop down a gear to pass.
The difference may be subtle, but it makes my bike feel more like a tourqey 600, rather than a big missile. Even if my top speed will be a bit less, at least I have more "useable" power at the speeds I normally ride.
I used to really like my bike, but now I love it!