I redline 1st gear every time. That puts me at nearly 40 mph. At that point I can shift into 6th and save the wear on my clutch
But seriously, for me: "easy going" is 2.5K-3K RPMs, "normal" is 3.5K-4K RPMs, "spirited" is 5K-5.5K and "aggressive" is every gear WOT to redline