I'm a Ben and Jerry's fan.
I find Ben & Jerry's far, far too sweet. And I don't really get why they have to load down their ice cream with so much extra crap. I tend to prefer simpler flavours - traditional vanilla, or chocolate. A good rum & raisin (preferably the one served in my local ice cream parlour) is about as elaborate as it gets for me.
Can't think what brands I actually do like. Hagen Dazs is ok, as is Green & Blacks. Not a big fan of most commercial ice cream, tbh. Except Magnums - for some reason, I always like a Magnum. But not the cheap imitation Magnum-alikes that my wife bought from Aldi recently, thank you very much. They were nasty.
Value ice creams tend to be quite unpleasant in my experience. Although sometimes so-called 'Finest' or 'Taste The Difference' versions aren't much better - they're just the same ice cream loaded down with more crap and extra sugar for a false sense of luxury.