M 15 is a beautiful, round, regular globular cluster. It is strongly and uniformly getting brighter towards the tiny and really bright core. There is no resolution in the center. As one is going away from the core, it first starts to look granular then the brighter stars appear. Many stars are visible in the outer regions. About 15 of these can be drawn by position.
When I started astronomy and started to draw deep-sky around 1994, I didn't see this cluster resolved for a long time. Then around 1996 if I'm right I suddenly spotted that it consists of millions of stars. Since then I like the great globular of Pegasus very much. It was an important landmark on the way in which I learned to see when looking into the eyepiece.
Polar ring galaxy
Barred spiral galaxy in the thick of the Milky Way
Interacting spiral galaxy
Lupus planetary nebula
Bright bipolar planetary nebula
Norma planetary nebula
Perfectly annular planetary nebula
Interacting galaxies in Pavo