Theres so many cheeses, not only is it hard to pick a fav, there is way more cheeses than there is in the poll. Cheddar is one of my favs, not sure about fav.
There's no better cheese than a proper mature farmhouse Cheddar, though unfortunately a lot of soapy pap is also sold under that name. I'm also partial to white Stilton, Wensleydale, Cheshire, Sage Derby, Taleggio, Double Gloucester among others.
I like brie, parmesan, hard goats cheese ( not that horrid white soft stuff that comes in a roll), camembert and mature irish cheddar. I just like cheese, normally I have a selection of at least 3 in the house.