I don't have a TV licence. And no, I don't watch live TV or iPlayer.
(Full disclosure: before they changed the loophole and made watching iPlayer licensable, I did use to watch it. But I don't miss it much.)
I primarily stopped watching live television because I morally object to the TV licence people and how they try to bully everyone into paying for something they don't necessarily use (guilty until proven innocent). I'd rather go without television than fund their shocking bully boy tactics.
I realise it's probably quite easy to watch TV without a licence, but I enjoy the smug moral victory from legitimately not needing a licence.