Works in the Hugo Novella category are almost always short novels (17500-40000 words).I feel like this category has undergone a bit of a renaissance with digital publishing…
Hugo novelettes tend to be long short stories (7500-17500 words). The little bit of extra space gives more flexibility and can lead to greatness (last year’s Wind Will Rove, or two years ago’s Tomato Thief spring to mind), but far to often they fall into the uncanny valley where the length makes them flabby without gaining the depth of a longer work.
I like short stories to be self-contained: a good idea or a complete story. As such I often gravitate to stories that are focused on doing one thing well. It also means that I tend to prefer vignettes, where Hugo short stories can be surprisingly long (7500 words or less).
This might be the best I’ve been prepared for evaluating the Hugos since I started doing this a few years ago…With a bit of effort, I might actually be able to get through all of the fiction categories.