Most people who know me know that I have a kind of childlike personality, that I'm shy and have childish interests and like to be spoiled, etc, so in that sense I think I would say I'm "openly" little to a degree. The other things I like to do to explore my little side, like diapers, I keep a secret, and I don't really mind it.
Openly wearing a giant cushy diaper all the time (for instance) sounds like it would be fun! But I don't think I'd like some of the other things that come with it (including judgemental looks, other people being included in the whole thing against their will, etc) so I am actually okay with hiding some parts of my littlehood. I do think I'd be miserable if I had to suppress every part of it, though.