When someone asks me what I like most about Maiden...
... I say I like the Thin Lizzy double/triple guitars, just as in Emerald, used as a main attraction, that I like the unique drummer who is completely inimitable, whether we like it or not, because what he does with the toms and the base drum is a mystery to me (now picture a gorilla eating a cake, right?), all that combined with such an amazing sense of melody that even the most filler-ish tracks and the songs I hate most are still better than... well, pretty much everything else.
But the easy way would be to play to that bloke Dance of Death. I find that to be rather representative.