You are a generous man Sult, and I'm not just talking about the Hive giveaway but the fact that you look for new Hive users despite being such a busy man!
Family traditions sound like a wonderful contest theme and no guessing that food traditions or special celebrations would be my choice. I agree with @cecicastor about having to write a post consisting of a certain number of words. Contests that are quite challenging too is when the post has to contain an exact number of words eg 250, no more and no less.
Looking forward to that and nice that you were inspired by @bigtom13's wonderful reunion with his biological family!