I would agree its yuck, however was told story from a friend in a local wine club where the organisers had an event starting off with a "mystery" aperitif. It was ice cold and most of the (knowledgeable!) wine drinkers said they enjoyed it. You guessed it, was Blue Nun. I have to say it hasn't tempted me to buy a bottle.
Moral of the story - if you're lucky enough to be given a bottle, get it in the freezer!
I love Blue Nun but I do tend to like wine that tastes of pop which is why I like Lambrini. There's a lot of snobbery with wine. It's what you enjoy at the end of the day.
Personally I think champagne is bitter and much prefer a glass of cheap sweet fizz. We bought a case of lambrini copy from Aldi for our wedding. We didn't see sense in buying expensive champagne just to toast with as half the time it gets left and thrown away. Everyone said how much they liked the wine and hardly any glasses came back with wine in them. Little did they know we paid less than £3 a bottle for it.