Hey Mickey,
We live next to a couple of large wind farms, with potentially more on the way. It depends on your own opinion of them really. It has certainly split our community right down the middle.
We hear them occasionally, but really only when the wind's from a certain direction, which puts them upwind of us, and us in wind shadow of the hill they're on top of. As PPD says, the rest of the time the noise is blocked out by the wind rustling in trees etc locally.
As for "shadow flicker", this is 100% predictable, so you should be able to check the original planning permission documents to see whether the properties you're interested might be affected. I know of one wind farm where the nearest turbines are actually shut down for certain hours of the day to avoid causing shadow flicker for a couple of nearby houses, so it's an issue that the developers and planners are well aware of.
One other thing to be aware of is that the mock up photos of proposed wind farms don't make the turbines look nearly as imposing as the real ones do once they're built. Of course you can read into that what you will, but that is definitely something I'd be wary of.
HTH!