Any bad habits that either of you has developed in past relationships regarding following your true path in life are carried out in this relationship, if you're not careful. Old habits are hard to break, and this relationship doesn't exactly present you with the impetus to move forward. Instead, even if the habits don't serve you now and never did, your partner encourages you to stick with them.
Not intentionally, of course -- but you're so comfortable together that it might feel like there's no reason to progress as individuals. After all, you don't really have a problem with the paths either of you has chosen in life; to whatever extent that you're meeting your goals, you both probably feel as if that's just fine. But if your partner focuses on your past too much -- for example, if you've traveled to places or seen things or held jobs that are attractive to them, or if you've had other relationships that they want to know every detail about -- their endless probing and questions actually serves to limit your growth from past to future. They don't mean to hold you back, but that's what happens if they're not careful! It's a good thing to look up to each other and respect each other's experiences, but there's no need to take that respect to the extent that they no longer want to experience life on their own. You're individual people, with different, needs, strengths and perspectives. The best thing is to push bravely out into your own life, regardless of what the other has or has not already experienced.