Novels often have leisurely openings; a TV drama needs an arresting opening.
The most moving scene for me in 'Pride and Prejudice' is the Pemberley music room scene: Elizabeth has just saved Darcy's sister from embarrassment and confusion, and as the music plays on, Darcy's look of gratitude becomes a look of love, which we see reciprocated in Elizabeth's eyes.
'Othello' is the most domestic of Shakespeare's tragedies and the one that's likely to strike a personal note with a lot of people watching it.
I would love it if anyone gave me the job of adapting 'The Great Gatsby,' but nobody ever does.