I'm more of a cider man than a beer drinker, especially when I've got my pirate voice on (Oi'll juzt be having a noice point o' scrumpy zoiderrrr, thankee), but on beer I have opinions. For instance, beer foam is to beer proper as chocolate is to cocoa powder, as wombats are to wombat dung, as a superior thing is to a not superior thing. This is because it is frothy, bubbly, fluffy, because it licks at your moustache like a schnauzer with a damp nose, because you can almost eat it, because it is like the magic stuff at the tops of the waves when a southerly wind beats across the surface of the sea. Whereas beer is a bit like urine, only more fermented (which is why beer drinkers commonly refer to "being on the piss", partaking in "a piss up", "popping down the pub for a swift half pint o' wee", etc).
Many beer drinkers think that the less foam the better the beer. This is because foam contains fewer molecules of beerness per cubic centimetre than beer proper, so that a pint half filled with beer proper and half filled with foam will comprise less beerness than a pint filled substantially with beer proper and merely garnished with beer foam. Indeed, if your goal is to consume maximum beerness regardless of all else, beer proper will serve your purposes better than beer foam. That seems to me a Philistinish goal.