boring
The opposite of repetivive is nonrepetitive
not fun, lame, boring, sucks,
Dull or boring
The opposite of exciting is dull, boring, tedious, or uninteresting.
Boring
boring
The opposite of repetivive is nonrepetitive
not fun, lame, boring, sucks,
Dull or boring
funing
interesting
exciting
'Fun'
amusing
There is no direct opposite of the noun. However, the opposite of the adjective formulaic (ordinary, usual, boring) could be innovative, unique, or unconventional.
The opposite of exciting is dull, boring, tedious, or uninteresting.