I agree with everyone else. Grey is now ubiquitous - it's the new magnolia. And the Abigail Aherne look is the new grey.
But most of us don't have high fashion houses - we want pleasant, neutral backdrops that don't have to be updated every couple of years. Grey, white and taupe walls all work really well and can be easily refreshed by changing your rugs and cushions.
I do think all-grey schemes are beginning to look very dated - where the walls, sofas, cushions everything is grey, especially a very cold silvery grey. I prefer a slightly warmer grey and lots of other colours - green, yellow, rust are my favourites - to warm it up.
The fashionable Abigail Aherne look - inky dark rooms - is fab but much harder to do well and will date quickly. I have a friend with wonderful taste who has redone her whole house in dark colours and I must say I think she's gone a bit far. It's just too much - I prefer the contrast you can by having dark rooms leading off a bright hallway, or vice versa.
The sludgy pinks can look wonderful but are even harder to get right. On a bad day they could look very like the dreaded magnolia which I truly hope will not come back - it's such an ugly colour. Ditto the 'hint of a tint' pastels which were everywhere in the 80s so probably due a comeback.
Newtssuitcase, I am literally about to begin painting my dd's room navy blue and have read your post with a shudder!