Generally liked
favorite, well-liked, approved, well-received, sought-after, fashionable, stylish, beloved, attractive, praised, promoted, acclaimed, recommended, in the public eye, in demand, celebrated, noted, admired, famous, in favor, in high favor, favored, successful, in vogue, all the rage*, in*, hot*, big*, trendy*, on everybody's lips*; see also fashionable, modern 1.
Antonyms unknown*, in disrepute, out of favor.
Cheap
low-priced, popular-priced, marked down; see cheap 1, economical 2.
Commonly accepted
general, familiar, prevalent, prevailing, current, common, accepted, rife, in use, widespread, ordinary, adopted, embraced, having caught on, in the majority, having caught the popular fancy; see also common 1, conventional 1, 2, traditional 2.
Appealing to or intended for the general public
accessible, lay, popularized, simplified, commercial, bourgeois, vulgar, pop*, geared-down*, dumbed-down*, kitschy*.
Pertaining to ordinary people
mass, public, grass-roots*; see democratic, republican. See syn. study at common.