variety is the spice of life

(idiomatic, informal, colloquial) that is a turn up for the book (expressing a surprise from an unexpected result of a situation, which is usually but not necessarily pleasant or relieving)

as you wish, be my guest, suit yourself

to err is human

in vino veritas

hunger is a good sauce

to err is human

old habits die hard

That's OK, that's alright

(idiomatic) a deadline is the best inspiration