ISTJ + ENTP

Don't consider this match unless Astrological Harmony is above 30. There are gaping differences between these two. ENTP's competitiveness will wear thin with the ISTJ. ISTJ's constant attention to detail and general thoroughness will slowly grind on the ENTP. Unless both in this pairing are further along in age, the ISTJ will tend to think the ENTP is immature, and the ENTP will think the ISTJ is a fuddy-duddy nag.