^I used to only collect 1/4 and also thought 1/4 was truth. I always assumed 1/6 was too small and probably lacked the detail and realism of 1/4. But I have to say, now that I've started collecting 1/6, the quality and detail is pretty comparable to 1/4, sometimes even better.
I'm still a 1/4 collector at heart and would probably still choose a 1/4 scale figure over its 1/6 scale counterpart, but I can definitely see why 1/6 collecting is so addictive. Both scales are awesome for their own reasons. For collectors that only collect one scale, I'd recommend collecting both if possible.