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Ah well, in that case I vote for taking that big ol' fish and whopping him in the head with it.  That's a joke... and yet...  
Well, me myself I cannot take criticism at all... I mean I REALLY suck at it, bad.  I get hurt and defensive, too many years of it left scars you know?  But, if I'm given Constructive Criticism, realistic suggestions, then eventually when my dander (first reaction no matter what dangit) goes down and I can think again then I can look at it and see what can be done... but specifics help... just saying "you're being weird" for instance wouldn't do a lot for me and I'm a total weirdo and always have been... do you mean weird compared to June Cleaver or weird compared to myself... you see how this could be confusing?  Not that that is at all your fella, but off chance the guy is like me maybe a simple suggestion, clear and concise would be a good idea??  *shrug* It's a maybe... 
Have you ever tried to compile a list of all the things that annoy you about him?  Then maybe go through the list and mark off all the ones that he can't help (ala snoring)... then from the list that's left ask yourself if you're being a git for thinking so much of something or if it really is something that is a problem... is it just because you're already cranky, or is it really important.  That sort of thing... mark off any you find... then once you have that list figure out which... ohhh say three things bother you the most... and ask him to work on specifically those things... or even just start with one... you know your fella better than me so prolly a better gauge of it.
You said that he refused... but did you give him specifics or just an in general 'man I married' kind of thing?  I'm still genetically the same woman DH married, but I know I've changed internally... but I don't think most people spend near as much time analyzing themselves as I do... I'ma bit of a nut about it, family full of nutcases I'm always on alert... neurosis I guess.  Point is most people aren't that observant about the little changes in themselves... and since they were never able to see themselves through another's eyes it's dern near impossible to see how they may have changed in another's eyes... if that makes a lick of sense.  Physically, yeah, but the inside stuff is harder.
Of course... you could invite him to make a similar list... or even make one for yourself (those are always harder IMO)... think of things he's griped about... 1... 3... whatever... and you work on those, if he works on his... so that you are both working to make your marriage last... a worthy endeavor... 
Worst comes to worse, and if yours is the competitive type, make it a challenge... one that even if you lose (but who wants to lose) you still win because it means your marriage is stronger... *shrug*
Just some random thoughts that came into the ol' noggin as I was typing... may be worth a try, may not be...