very enthusiastic (for people)
avid
loud and high-pitched (for noises)
piercing
boring and depressing
(life, day, town)
perfect, with no faults
(complexion, performance)
flawless
ordinary, normal
(people, opinions, ideas)
conventional
shocking, making you feel very upset (not used to describe people)
harrowing
producing a large number of work (for artists, composers, writers)
prolific
boring, without life, excitement or colour
(afternoon, people, weather)
dull
perfect, faultless
(appearance, taste in clothes, reputation)
impeccable
ordinary, conventional, neither strange or extreme
(beliefs, ideas, politics, organisations)
mainstream
very beautiful, surprising or impressive
breathtaking
happening at irregular intervals
sporadic
ordinary, boring, giving little satisfaction
(often used to describe jobs)
mundane
sth that has not been spoilt or harmed
(record, reputation, character)
unblemished
ordinary, nothing special
(computer, supermarket)
run-of-the-mill
not strict or careful enough (for safety measures, security, morals, discipline, laws, etc.)
lax
very loyal
staunch
boring, often frustrating
(journay, task, job)
tedious
ordinary, not extreme
(music, ideas, beliefs)
middle-of-the-road
very sudden and very quick (generally used with the noun rise)
meteoric
too general and therefore not valid (for statements and generalisations)
sweeping