I've seen some quibbling about the Sorting of a Bell on Tumblr, so here is my advance gloss of how I expect that conversation to go:
Hat: Well, you look like a -
Raven: Just a moment please. Are you trying to put me in Slytherin? Don't do that.
Hat: Ah, but it suits you, your thirst to climb to the top -
Raven: Yes, yes, terribly thirsty, which is a large part of why Slytherin would be a terrible idea. It's a bit of a catch-22, admittedly: the House intended for the ambitious is currently trying to crawl its way out of a reputational pit deeper than than the Marianas Trench which will stymie the ambitions of anyone who touches it, and this isn't helping you populate it with willing volunteers who can help remedy the situation. But I've no loyalty to the place - Mum was a Ravenclaw and Dad's a Muggle, and even if she weren't, I'm simply not the type to care. Putting me in Slytherin will help something I do not care about at the expense of my own preferences, comfort, and plans, and if I were interested in letting you do that, then I would *not* suit.
Hat: ...
Raven: Ravenclaw, please. It is nearly as good a fit, especially for the next seven years. Slaking my thirst is expected to come later on. Plus it's a legacy. I will tolerate Hufflepuff if you prefer it, though I doubt you will.
Hat: ...but...
Raven: If you try to put me in Slytherin I will make Mum send me to the Owly after all, they sent me a letter too, I mean it.
Hat: RAVENCLAW.