iTessen
I kind of regret it, actually. Last year I got a ton of stuff from it.
If its any consolation, you probably didn't miss out much from this year's Christmas event. I opened 100+ presents, and most of the
rewards were either gold or monsters... I did get a couple recipes and one ring, but the gifts didn't give me much in the way of loot/items. I was kinda hoping to get more Christmas loot since I fell short on some stuff from last year.
iTessen
I also dodged the Halloween event, which I heard was a lot better than last year's.
I missed last year's Halloween event, but this year's event was pretty cool. The trick-or-treating was great for rewards. Plus, they added the whole evil portal aspect (which included new kill badges, Halloween recipes, and new loot). I rather enjoyed it even if I didn't have much time to participate!