Agents Mulder and Scully are opposites, and it is certainly entertaining to watch them disagree and butt heads!
Relationships between opposites can be extremely challenging, and that is why the FBI put them together: so that Mulder would fail and give up his quests to investigate aliens and the paranormal.
Once Mulder and Scully embrace their differences and learn to communicate and respect each other despite them, they have many exciting and harrowing adventures.
Spoiler Alert! They manage to survive these and eventually come to establish a strong bond of trust.
This trust allows them to anticipate, look past, and work with each others' preferences. Ultimately they make an excellent, one-of-a-kind team that is capable of amazing feats!