What's nicer: plain apple crumble or with other fruit & bits added?

[sergeantmajor]

I'm wavering between whether I should make apple crumble, or apple + plum crumble. And then I got distracted by thoughts of sultanas in the mix and nuts in the crumb. It's for a special occasion.

What combination of fruits etc do you think is the nicest?

Definitely apple & blackberry

I hate blackberries. I love a spicy crumble with cloves and cinnamon or Cardomon. Yum!