For me it took time and a deliberate effort to do certain things. Most things I really enjoy now - voting is a biggie for me, and I really like being able to join in singing Happy Birthday (my 2 year old granddaughter's favourite song!).
I have to confess, though, that I find Christmas a bit much - the first few years we went all out and made it a big deal, but I found that everyone in my family was getting edgy and unhappy and sometimes it was not turning out well at all. At first I had the awful thought that maybe things weren't going well because there was something wrong in celebrating Xmas (the deeply ingrained JW paranoia). Then I realized that we had never had the opportunity to develop a tradition around xmas, so in many ways it feels forced and artificial. I think it's important to try and make each of these things your own (hehe - sounds like a JW song, don't it?) rather than try to just imitate how "the world" does them. I'm quite comfortable now picking and choosing the things I want to celebrate or participate in, like normal people! - not everyone says "bless you" for example, not everyone celebrates Halloween, some of us feel uncomfortable with blood transfusions as a medical treatment - just because we are now free to do these things doesn't mean we have to do them.