Hello, Brian
When you noted that Ada “also includes riddles no one person will be able to master, but so does life, and we can enjoy both,” you were referring, in particular, to the various kinds of fun obtained from reading and enjoying Nabokov’s works. It's curious that VN, when he spoke about good readers and writers, didn't actually emphasize the importance of their sense of humor to aid them in their progress through hardships, serendipities (of Gene Barbatarlo's 'pnincidences' type*), aesthetic bliss … to their happy embracing at the top of some Mt. Glitterntin with a view of the Gulf of Surprise… Thank you for having brought this aspect up: the fun of reading Nabokov.
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*GB in "A Visual Pnincidence" and "Aping the Ape" [The Nabokovian, 73, 2014] from where I selected this sentence:"…it seems that any concentrated Nabokov entrerprise, be it writing an essay about him, teaching a course, or mapping his topography, brings up little curiosities: high-definition coincidences, arrows chalked on housewalls, gentle strokes of luck…" Humor, bliss, rage, indignation and a sense of ongoing mystery since, as JS set down (940): " Man’s life as commentary to abstruse/ Unfinished poem.”