I think modal verbs can affect the general pattern quite a bit sometimes. In this example, the negation and the verb "хочется" are the crucial modifiers. If you had said it like "не хочется выбрать между...", it would've sounded like "when you specifically don't want this selection to be ever made", while as long as you just mean "when you don't want to select", without going into any extra details, Imperfective is your choice.