I know this is a very subjective question but as text rendering in WPF is still an issue I have to make the best out of it.
In WPF Application text tend to become blurry that is no secret. Also there are countless website about this topic and how you get around this problem. But I wonder ... text blurriness seems to affect some fonts more that others. So I am still looking for the best font available to get around this issue.
So far I am still using Arial and it doesn't look good. But I am sure some other font are more suitable for the task at hand.