Hate to say it because Canadian fresh blueberries aren't very available right now, but frozen blueberries taste different to me than fresh... all the small ones seem to end up there from my impressions of eating them, while I like the bigger blueberries more. Also, in smoothies I don't put more than a pinch of them (7-10) because it turns the smoothie very purple and takes away from the rest of the fruits I add.

If you want something better to pair it with, try plain yoghurt? I think the mild sweetness of blueberries could be brought out better when paired with a more sour taste.