Your favorite paint colors?  

We recently had the same issue when selecting a grey paint for our home; the first time we painted the nursery it came out *very* purple.  We went back to the paint store (Sherwin Williams) and the guy there pointed us to a couple of grey paint chips which are made with only black and white, rather than any other color being added.  This did the trick for us.

Greetings Grendel,
I guess that I'd be tempted to paint the walls/trim/ceiling the same shade of chalk white (but eggshell for walls and ceiling, semi gloss on the trim..).  But I do like Farrow and Ball's Lamp Room Grey,  and I like vodka.
Best,
Your Aunt Mark

I did my entire condo except for the kitchen in a slightly warm, very pale gray and I like it a lot. I can look up the color when I get home but just because it looks good in my place doesn't mean it's the right color for your lighting and stuff.  
What I would do is get some chips in a straight black/white pigment mix and then a lot of others in all kinds of blends with various color pigments.  Then compare each one to the true gray chips (including ones so pale that they look white).  And compare to a true white chip, too.  When you look at a single chip by itself, it can be very hard to tell what the undertone is, but when you compare it to a true neutral, it's usually obvious.  
When you've narrowed it down to a few, then you can get some sample pots and sheets of poster board.  Paint the boards and stick them on the wall in various places.  Maybe leave a border of white around the painted area because when you put your sample color next to another color, even an off-white, you can't get an objective read on the new color.  It's going to be skewed by whatever color is right next to it (like your three samples that are directly on the wall). 
 

Thanks all!
Spanky- yer so smart!  Poster board would have defintly been a better idea than slapping it on the walls.  I was trying to force myself into action and failed 🙂
Mark-  OOOOhhhh that grey is lovely.  I like gin, French 75s are the best thing that ever happened.