I freaking love flannel! All my winter nightshirts are flannel and I have two flannel button downs, and would love to amass more. The reason I only have two is that sticky wicket that it's ubiquitous in plaid, and I don't do plaid.
I *do* do gingham, however. I have one shirt very much like the kkards sample (I consider Buffalo plaid oversized gingham! but can't do the classic red/black because then we're back to lumberjack territory!) and one sort of purplish gingham from Lands End. The thing that makes me sad is that these great companies for rugged clothing, like Lands End and LL Bean, have not gotten the memo to introduce new colors every year! They've carried that same damn purplish gingham for years. Throw me a bone guys, I would buy 3 more colors if you would just introduce them.
And just an FYI for anyone considering it, though I love J Crew Factory for their summer weight gingham and chambray button downs, their flannel is crap. Way too thin and not warm at all.