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.
(..) - What's a Code Red? - It is a disciplinary engagement. What's that mean? A Marine falls out of line, it's up to the men in his unit to get him on track. - What's a garden variety Code Red? - Sir? Harold, you say, 'sir,' and I turn around and look for my father. Danny, Daniel, Kaffee. Garden variety. Typical. What's basic Code Red? Sir, a Marine refuses to bathe on a regular basis... the men in his squad will give him a G.I. shower. (..)1992 A Few Good Men