Im nae sure if anyone said this one but I love my tatties with cream and butter - yum! Not god for you but a nice treat!
I was going to suggest a little tarragon, but I am so taken with all of the other suggestions. The saffron has me in a daze! Must have!
Boil the potatoes in chicken stock, drain and push them through a ricer, mix through roasted garlic and cream cheese, then push it all through a drum sieve. Garnish the most divine potato purée with some finely chopped chives! 
Nutmeg, sometimes. Otherwise I just use cream and butter.