I actually started out as an ICU RN, and when I left, many of my friends thought I'd lost my mind. I am pleased to report that, contrary to what they may have believed, I was not body-snatched.
Many of the same things you probably love about ICU, you will love about OB:
1. Teaching...it's still family-style teaching, and just as vital.
2. Lower pt ratios for more 1:1 time...not always the case, but I do L&D & Nsy.
3. Adrenaline rush! Can you beat having a baby? And, it's mostly a happy ending.
4. High Acuity...ever take care of a patient you couldn't see? And nobody goes to crap faster than a bad L&D (HELLP, Eclampsia, PPH, cord prolapse, abruption). Not saying we like to see these things happen, but losing your skills isn't a worry, alright?
5. The heart factor...the same way you can be deeply moved by your unit pts and their families, so can you carry a part of your laboring family with you always. There is never a time when I am tired of being there the moment a family becomes, or stretches to add another heart.
I have had the occasional moment when I missed ICU. And, but you know, if you lay down, the feeling will pass in just a few minutes! LOL. When you've found your niche, you know it, even when there's stress & compassion fatigue. Impossible to know online, but your post doesn't sound like ICU is your passion. What have you got to lose by broadening your horizons?