You know what they say: 'variety is the spice of life'. [=life is more interesting and enjoyable when you do different things]
The talks covered a wide/great 'variety of' topics. [=the talks covered many different topics]
I was surprised by the 'variety' of the choices that were available.
(..) Well. Mr. McMurphy. what you're asking... ...is that we change a very caretully worked out schedule. A little change never hurt. huh? A little variety? Well. it's not necessarily true. Mr. McMurphy. Some men on the ward take a long. Iong time to get used to the schedule. Change it now. (..)1975 One Flew Over the Cuckoo's Nest