I'm sorta torn... There is the Sunshine Challenge, in July, which is an excellent addition to the calendar, and which last year worked in a somewhat different way to Snowflake which I thought was very good. The prompts made it easier to talk about Something Interesting, without having to be repetitive.

The thing about Snowflake is that it has got to be hard to think up daily challenges that can apply to everyone. Doesn't matter what your fandom is/fandoms are, you can do X. I've been doing the Snowflake Challenge for several years, and am aware of a certain amount of repetition, because it's inevitable.

Perhaps the way forward might be to have one challenge per month? (Perhaps, per month but excluding January, July and December?) Something fairly general? Then again, it might be that the compression of Snowflake into one month is one of the reasons why it works: I know a lot of people have trouble keeping up, but if it were more spread, I suspect a lot would lose interest.

I definitely understand the appeal of the idea of more pan-fandom challenges.