By Catholic (and maybe other church) standards? Christian. The sacrament of baptism is indelible and can't be revoked, ever. (That's why you can't be baptized twice.)Treblaine said:What's it called if you have been baptised, used to go to church as a kid, celebrate Christmas but don't believe in god and don't think the Bible is any kind of law or edict but mere parable?
But if your only connection to a faith of any kind is that you go to the parties members of the faith hold, then you're a partygoer, not a Christian. Being Christian means accepting that Jesus of Nazareth was, well, the Christ. A lot of atheists/agnostics/don't-care-what-I-ams celebrate Christmas as a secular holiday because it's still fun to decorate the house and get/give presents and have parties. And depending on the specific person, some Jews have a very Christmassy Hanukkah, with presents and stuff and a sense it's the "big" holiday of the year. (As Jewish holy days go, it's not a big deal.)
tl;dr - You're Christian if you believe in Christ, not just if you like Christmas.
(Edit: Weird, second half of my post just up and vanished. Attempt 2....)
Agnosticism isn't, despite popular belief, atheist-lite. It's a separate belief that's compatible with but not necessary for atheism (and even some faiths). Simply put: Agnostics believe that the question of whether or not god(s) exist is unanswerable. Some of them still believe in a god or gods but do not think they'll ever have proof. Many others don't believe in any god and the agnosticism is a side point.