Depends entirely on the requirements at hand
For cheese & crackers platter I'd do a nice mature cheddar, good n crumbly with lots of sharp tang/bite, and a young edam for that creamy nuttiness.
A burger on the other hand, I'd go smoked gouda, colby jack, or my personal fav an aged gruyère for that combo of earthy/nutty with excellent melting properties, which is a must on a burg IMO. Only change to this is if it's a lamb burger, in which case feta ALL the way hands down, something about that mix is just outta this world good.
Also on pizza. Love how feta doesn't really *melt* but does go into a small gooey pile
And speaking of that meltiness, sometimes you just want overpowering rich unctious hot piles of melted cheese, in which case you can't pass up raclette. Bit bland compared to some, but over some properly seasoned potatoes and bacon chunks (or preferably
speck)...bah gawd.