I look at the start of the stream and just follow the line, hoping I'm hitting 300s. Despite getting tons of 100s and 50s, I don't miss, which means probably only my tapping is shit. It seems that more experienced players would just instinctively adjust their cursor speed during streaming, judging from how close the circles are from each other. Well, in my case, I look at the stream, not the cursor.
kids, don't joke about rsi, it's not cool to have it, it doesn't inflate your e-peen, just makes you look retarded for being proud of it
"Overall, I think people tend to reveal their true selves when they step into an avatar. As I said earlier, they probably feel some sense of freedom. But freedom easily gained quickly turns into a false sense of omnipotence."
I usually don't look at the cursor directly. I look on what's coming up ahead so I can be ready for it. The correct movement speed to move through the stream comes from muscle memory after a bit of practice. The whole looking ahead thing comes from playing Touhou. If you stare your played directly you won't make it far in harder difficulties because you can't see the bullets coming at you soon enough. If you look around to see what bullets are heading towards you and where is a safe spot to move you be doing a lot better. Same goes for osu! If you look ahead of the patterns coming, you'll be ready for them. This of course is a personal preference, just like many other things such as single tapping vs. alternating and mouse vs. tablet.
I personally have more trouble keeping the tapping consistent. I have noticed that having a good posture while playing helps. I usually lean back a bit when I sit, but when I actually sit straight I can do streams better.
Trying to play osu! with mouse alone is like trying to play a guitar with one hand.