12. Lack Of Leg-Room
Cinemas are like aeroplanes: they're designed to get the most number of people in at a given time to keep costs down, and that means they're often very cramped. If you upgrade you might get a couple of feet to play with, or a bit more if you manage to sit on the front row. But for the rest of us, unless you have legs that are much shorter than your arms, you'll be squeezed into a tight space and pretty uncomfortable before the film even starts. And with no real air con to speak of, chances are you'll get really sweaty too.
11. People Shuffling Past
With no intervals in modern screenings, and all that food and drink inside you, chances are that someone in your screening will need to get up and use the loo. Fine - except that because there's no leg-room at all, if anyone wants to get up and go, everyone between them and the aisle has to stand up. If that happens mid-film, you might just miss the most important bit. And don't think arriving late is an excuse to do the same - if you turn up late, go and see something else.
10. Long Adverts & Trailers
We're living in a corporate age, where everything is sponsored by someone or other and advertisers use every trick they can to make us buy their products. To this end, you're forced to watch 20 minutes (sometimes more) of adverts crammed with subliminal messages, and then trailers "deemed appropriate for this audience" (patronising or what!). And it's all self-defeating: the adverts are obnoxious and the trailers give away all the key plot points, so that we don't have to see the film in question after all.