Yes, the wide vibrato she has can really put some off- especially when she multi-tracks herself and there's 4 of her all wobbling away.
I just see it as part of the package. When extreme talent/giftedness/genius graces me with its presence, I often accept the stylistic quirks contained therein that aren't quite my first choice. It's the message, not the medium. I don't think there is anything she ever really did that I dislike, and plenty that leaves me jaw agape or heart on the floor. A contender for best singer-songwriter of all time, without a doubt. She is directly wired into the emotional grid and can tap untold current to proclaim her magical tales.
Her observational life-sketching style on The Hissing Of Summer Lawns is a high point for me.
Anyone ever heard Travelogue where she reinterprets some of her work with an orchestral flavour? One of the last things she ever did before the smoking stopped her in her tracks- it's bloody brilliant. Haunting, aged genius. I must now go and find out if I can find it in a high-res format. Could play that album again and again.