yes, this is very natural. however, i would note that the comparison to (romantic) love that i'm picking up in your tone may be more approrpriate than you realize. this isn't necessarily a good thing.
i came from the protestant perspective to orthodoxy and it was a whirlwind romance, stemming largely from the historical appeal and intellectual correctness of the doctrine/beliefs. freeing myself from sola scriptura, embracing apostolic succession and Tradition, icons, the fullness of the faith, etc. was wonderful.
like all romantic love, you can hit a wall and things can become routine, or you wonder why after 4, 10 or 20 years you don't have that same passion that you had at first. this, in my experience, can lead to confusion and disappointment. is something wrong? was it a phase? all i can say is persevere and put in the work and you will have more reward than you could possibly imagine. actaully, getting PAST that point asap is recommended (again, in my opinion) b/c at first you are focused on all the things orthodoxy is that catholicism and protestantism is NOT, and while those things DO matter (don't get me wrong) it's best to move beyond those issues and focus on your life as an orthodox christian. it's hard to do that when you are just sitting in the liturgy feeling proud of your intellectualy "rightness" and choice of affiliation.
i realize i'm making a lot of assumptions here, but i suspect that this experience (or something like it) would ring bells for many converts. but please enjoy this time, and pray that it lasts forever- it may. it is wonderful to encounter the mystery of the Church for the first time...i just want to throw out some ideas that may mean something to you down the road. your mileage may vary.
edited to add: i don't mean to sound discouraging in any way. i love my faith and am so happy that i made the decision to answer God's call to orthodoxy. i just wanted to address the issue of "convert's zeal" and add some perspective on how things change for some over time following embracing the faith.