my favorite stick...that's tough.
Was a HUGE fan of the original Synergy Grip, had a 110 flex shanahan...loved it. Then I got a deal on an Mission M-1, and really loved that, but the durability was crap...3 of us got them at the same time....my 2 friends had theirs break within a month or so....mine broke at about the 50 day mark, and I wasn't playing THAT much at the time...still felt really nice.
Now, I've got an Synergy Grip, shanahan 110 flex again as well as a Bauer Vapor XX Max Stick'um, lindros 104 flex(???) I believe....and then yesterday I got a Easton Stealth CNT Grip, Heatley, 100 flex on Ebay for $100 canadian