The primary reason I keep a log is that often times I cannot remember or recognize what I have seen before. The written record serves as a prompt.

Open clusters can frustrating in that they may not be obviously distinct from an unconnected asterism. Globular clusters are satisfying because you always know when you've found one, although it may not be the one you think. There are few globulars visible in the winter. And ponder this: there are only ±150 in the entire galaxy, centered about the galactic bulge mostly in the constellations of Sagittarius, Scorpius, and Ophiucus. These are summer constellations. The most famous globular cluster, perhaps, is M13 in Hercules. I think it is more impressive to see it smaller and isolated against a greater expanse of black sky. There are other clusters as attractive as M13, e.g. M22 in Sagittarius.

Later addition ... I am coming to appreciate the open clusters more. For a beginner, they can be more challenging than globulars, but they can also have more character, especially the two in Scorpius (M6 & M7) and those in Sagittarius (M18, 21, 23, 25 & 26).