With Talk Talk, I'm not overly fond of the singer, and I find it almost impossible to understand what he's saying. But the music is pretty amazing, so it gets a pass.
With Portishead... I'm really not a fan of the scratching, though it's not overused, and only really degrades the song on one or two tracks. I've also fallen out with electronic drumbeats in recent times, they just irk me lately. Despite both of those things though, I'm somehow listening to the album the most at the moment since I first bought it and tried it out about a year ago, and quite liking it.