I don't personally have low aspirations when I go and see a film like this. I just know what i'm going to see before I see it.
if you're going to go and see a film like this and analyize the script, the plot, the performances and whether or not you actually cared for any of the characters then I really wonder why you bother in the first place.
(and when I say 'you' I mean it in a generic sense rob, I totally respect your opinion)
this film, like shoot em up, for me, was always about the visuals. shoot em up had brilliantly over the top gunfights backed by a pumping heavy metal soundtrack and I loved it.
that was despite having one of the most ridiculously thin plots holding it all together that i've ever seen.
I'll go and watch any film (except westerns) and i'll gladly go in knowing nothing about what i'm about to see and hope for the best, but when i see trailers for films like this I go simply because all I want is just mindless entertainment to cheer me up and purely on that aspect I personally feel that Wanted delivered in spades.