unpretentious un·pre·ten·tious \ -ˈten(t)-shəs\
not having or showing the unpleasant quality of people who want to be regarded as more impressive, successful, or important than they really are : not pretentious.
free from ostentation, elegance, or affectation : modest –MW
modest mod·est \ˈmä-dəst\
not too proud or confident about yourself or your abilities : not showing or feeling great or excessive pride –MW
There's a really great phrase for this, it's even an acronym now: (using language that I am not allowed to utter here) 'I Don't Give A [Care]'. There's also, 'gives no [cares]' and 'no [cares] given'. (Oops. Did I go too far and upset someone's pretentious sensibilities? -hook, line and sinker; your move ;)
