Perusing what people think of Rambam, there are complimentary (or more particular) arguments to my previous statement that he is a consistent rationalist:
1) he is summarizing Gemorah without necessarily trying to reconcile it with specific local customs, as some later ones do.
2) he is focused on what he thinks is the most logical conclusion, rather than resorting to voting. Voting would give you a statistically better result, but with less internal logical consistency.
This just supports further my thesis that learning Rambam helps learning a method. You can probably learn from him how to stay on topic and summarize information in easily accessible way (I did not succeed here, maybe I should take on Rambam yomi …).
I would add that comparing with the middle ages, humanity – through trials and a lot of errors – made a lot of progress in developing rational approach, so Rambam helps us guide in how to use rational method. For example, if we look at halakhot of health and learning, we can easily expand and develop newer ways using Rabmam’s ideas.