By all rights I should be the biggest fanboy ever. All my computers are Macs. I have an Apple TV. I stood in line to buy the first iPhone on launch day and have owned nothing but iPhones since. I have an iPad. I insist on using Apple services like iTunes so everything "just works" with all my Apple devices. I even converted my whole family from PCs to Macs and, yes, my "family tech support" calls have dropped.
But I'm not what you would call a "fanboy".
If someone asks why I like Apple products, I try to give rational reasons but I admit from the start that I'm biased and just "like them", plus I "think they're cool". I never sneer at PC users or people with Android phones. I don't make lame jokes about "Winblows" and such.
I guess my point is it's possible to become a total convert and still not annoy the heck out of everyone around you. I'm not saying you don't know that, just that you should monitor yourself. Once you become loyal to a brand (Apple, BMW, B&W loudspeakers, whatever) it's sometimes difficult to tell the difference between being a proud evangelist and an annoying cultist.
Luckily, I had some friends who helped me whenever I veered too far in the latter direction. :)