Let’s talk about the most important feature of the letter B: the buttcrack.
A failure to really dig in to the buttcrack creates a bold spot, but even worse, it de-emphasizes the B-ness.
Glyphs should always be proud of what letter they are! This becomes even more important when designing type for smaller sizes.
Also, the top bowl is a little smaller, helping the letter stay balanced. We see a similar thing on K, S, X, Z, and all snowmen. Let’s move on to the lowercase.
An ascender overshooting the cap-height lets us differentiate I from l and 1 and so on. And could very well get you laid. Ok! Maybe not!
b has an ascender, or a stem going above the x-height. But why does it go past the cap-height?