YMMV / Mrs. Dalloway

• Alternate Character Interpretation: The book itself gives us a number of these, utilizing the Switching P.O.V. to contrast various characters' self-perceptions with the ways in which they're perceived by others. The most notable example is probably Miss Kilman, who comes off as a total Jerkass in Clarissa's sections but becomes much more sympathetic when we see things through her eyes.
• Big-Lipped Alligator Moment: A few of the digressions approach this. At one point a nurse sitting on a bench is compared to "one of those spectral presences which rise in twilight in woods made of sky and branches." Woolf then gives us a two-page vignette about a traveler who sees one of these specters in the forest, is driven by his vision to contemplate the meaning of life, and then returns home, shaken, to his normal existence. Rule of Symbolism is definitely at play, but what exactly the symbol is supposed to represent and why it needed two pages to elaborate is left for the reader to decide.
• Harsher in Hindsight: Septimus considers suicide. He eventually goes through with it. The entire subplot can be read as a representation of Virginia Woolf's own battle with mental illness, which ended with her own suicide in 1941.
• Jerkass Woobie: Miss Kilman. She's judgmental and unpleasant, but it's hard not to pity her after learning her backstory and seeing how much of her jerkassery is compelled by loneliness and self-loathing.
• More Popular Spin-Off: The character of Clarissa Dalloway originated in Woolf's first novel, The Voyage Out. Nowadays Mrs. Dalloway is by far the more popular book.