Oh, it's hinted at here and there, you just have to look to find it. Like religion, that's one of those that I don't feel needs to be used to whack folks upside the head with.
For me, personally I'm a very opinionated, even bombastic individual at times, but most people don't see that of me, or my thoughts/direction that I take on things until you've come to know me for some time or catch me in the right moment. I'm very much of the opinion, personally, that there are things that just don't need to be pushed into people's faces and while you can have an opinion (for, against, or completely ambivalent), for me, personally, I'm not one of those to push a direction or agenda.
For me, writing, and the characters that are presented therein, are better off if they can make a connection with the reader on some level, or capture their attention so that they can start to fill in the blanks themselves. I've always liked to have options, and for me at least, nothing sucks more than to have every line, attribute and minute decision about a person/character decided and outlined for all to see. Leave a bit of mystery, give yourself some leeway, have a bit of fun. Besides, it allows us so many other options as a company to decide what we're doing with XYZ down the road, instead of painting ourselves into a hard-edged corner.