without interest

commonplace

(of food) with very little taste

tasteless; indistinctive

(of talk, behaviour, work etc) causing a person to lose interest and feel tired

uninteresting

dull; uninteresting

dull, colorless

silly

stupid

without taste or flavour, without interest, spirit

dull, uninteresting

dull; not shiny or glossy

dull, lifeless

dull; uninteresting; commonplace

unimaginative

having to do with emotions (and not practical or sensible judgement); producing, expressing, (often too strong) feelings

emotional, romantic

dark; gloomy

dull, lifeless

long, tiring and not interesting

dull, monotonous

(of remarks, ideas, opinions) ordinary and dull

silly, commonplace

not appetizing

distasteful