I am not crazy about the mags that are filled with pretty pictures of someone's custom paint job. Yeah, they're pretty, but so what? I can't use that info.
I'm also not crazy about mags that are full of reviews of new bikes...I' won't be buying a new one every three months, or even every three years. But of those types, I think MOTORCYCLIST is the best.
I do like RIDER because it's got a lot of info you can use about enjoying your CURRENT bike...trip reviews, maintenance tips, accessories, etc.
ROADBIKE has a similar focus, and is all-metric, but not quite as skillful in its content.
And then there's the "no pretty pictures" MOTORCYCLE CONSUMER NEWS, which packs a lot of hard info into a few B&W pages.
Finally, if you really enjoy reading MC travel, the quarterly MOTORCYCLE ESCAPE and bimonthly ROAD RUNNER are good. RR's writers are not always the most skillful writers, but they can be pretty honest about unfriendly towns or great finds.