Wow, very generous of you gbelleh! 2012 was pretty good for me too -- although I've just as of this month decided to start being a part of forums
As for your questions:
My first Spydie was also a Tenacious. A black coated, black handled Tenacious that cut miles of cardboard, plastic wrap, zip-ties and who knows what else while furnishing office buildings (back before I had a clue how to sharpen a knife, too. Restoring that edge was a bit of a chore!) It served me well and seemed to do a stellar job at infection!
My latest acquisition has been the recently discontinued Chokwe. My first Taichung model, and boy it's sweet. Had to loctite my pivot screw, but since then it's been a joy to behold.
And well, many things have surprised me along this trip. I guess one thing would be that I've been so nearly exclusively Spyderco so far in my collecting. I ought to branch out soon, but the variety, aesthetics, company philosophy and personality just can't be matched. I've also been surprised how quickly it got out of hand... ~$35 Tenacious led to the ~$70 Manix 2 LW, and while a year ago I scoffed at the seemingly ridiculous price of say, a Sebenza or a Southard... now, not so much!
Thank you for the opportunity to get a Stretch, gbelleh -- it's certainly something I've wanted to pick up soon.