My pick for the deepest division is the West this season. From St.Marys all the way up to LaSalle, London, Chatham, etc. there's always good close games. You know a division is tight when the 7th-8th place team is defeating Cup contenders. And when the bottom team's aren't beating them, they're losing by a goal or in OT. Best hockey I've seen in this league in a while. Will make for great playoff hockey.
After the West, the Mid-West is interesting too. Brampton & Brantford seem to play good teams fairly close a lot. But there has been a few blowouts, but that's just Jr. hockey.
The Shoe is still a great ticket though. But this season there's two teams that were question marks to start the season. But full credit to Pelham, they've had a very respectable season after having a disaster of a season the year before. But Thorold falling apart has hurt the parity a little. I give Kelly a ton of credit for doing his best to hold things together. A few things didn't pan out right from the start, but they should be better next season.
Buffalo has been nothing short of an embarrassment and sideshow this season. From a player tweeting that he was forced to dress while injured , so it would help make it look like they had a full bench, to ruining the scoring title.
Anyways, just thought I'd give my take on things right now. Let's see what everyone else has to say.