Ugly as it may be, Comic sans MS is highly readable and well-designed. I hated it years ago- way before it was 'cool' to hate on Comic MS. Helvetica (along with other gothic sans fonts) is not suited for small print.
Helvetica and Frutiger are only popular now because of the "retro" design craze (which made way for the movies). Visit any Urban Outfitters and you'll see what I mean (you might also vomit). It's a return to modernism, partially. It's also a reaction against postmodernism. I'm a fan of the movement, and I like seeing design slide back into the 60's.