I'm lucky that I've got pretty good manual dexterity and eye-hand coordination. But, I'd say that this is not critical. Sometimes in anesthesia, it requires brute force and experience. I was humbled this past week when I had a difficult intubation. I had the surgical attending, two surgical residents, my attending, a surgical student, the scrub nurse, and the circulating nurse standing around me. I was trying to intubate an obese patient who was a little deep and had a floppy epiglottis. Now, you realize that on this rotation I've done about 30 intubations successfully and I was probably getting a little cocky. So, when I pushed the tube into the stomach and saw the stomach going up and down like a trampoline and seeing that dreaded "0" on the capnogram, I figured I'd just pull out, ventilate and try again as the SpO2 "beep" started its decrescendoing sound. But, next thing I new my attending was shoving me out of the way, cranking-up the sevoflurane, bagging the hell out of her, yelling at me to grab the sux and push it quickly, etc., etc. It really embarrased and humbled me.
Thanks Skip! It is good to hear that I am not alone. I guess this is why we are in "training".
Afterwards, I was explained that the patient was in such a light plane of anesthesia that there was a high risk of laryngospasm. That's why he shoved me out of the way and knocked her down hard. Also, he got the tube in very easily. After that, it was smooth sailing. And, I learned a lesson I will never forget.
What's my point of telling you this? It's good to know your limitations then practice and work on them. Sometimes, you get cocky and you forget what you can and cannot do. It's better to start and say, "I'm not sure about doing this" (as I should have in this case with what, as my attending later agreed, was a difficult airway) than to march forward not questioning your ability to successfully do the skill.
So, it's refreshing that you admit your limitations. And, don't be worried about your current lack of dexterity. Like others have said, it takes practice. Repitition, just like everything else, is key.
Good luck. Do a rotation (or two or three) in anesthesia to see if you like it. This will answer your question more than anyone will be able to do here.
-Skip