It's not unusual for two people of diverse political and relgious persuasions to feel an affinity for each other b,ut whether their attraction to each other will stand the test of time very much depends on their level of maturity and capacity for tolerance.
If you reach an impasse when debating your ideals, you need to share the ability to agree to to differ rather than continually trying to chip away at the other's beliefs and mores.
I come from 'mixed' parentage. Both lawyers. Democrat public defender mentality pop meets Republican hang'em high prosecutor mom. WASP meets Catholic. Damn Yankee meets Southern belle.
Political, religious and legal debates at the family dinner table have always been, and continue to be, lively to say to least but certain rules apply namely, the crockery and the cultlery stay on the the table and, though voices can become loud-ish, no shouting or overtly personal insults (unless of the extremely droll or humourous variety) are allowed.
It comes down to live and let live. If you're convinced you can live with him without wanting to change him, and if he feels the same way about you, I don't see any reason why you should be in with less chance of a happy and long-lasting than any other couple with the proviso that should you become disenchanted with each other, any fundamental differences may bite you on the bum with a vengeance and rapidly become intolerable.
As for his OCD and your slobbishness bookishness, a dishwasher and a cleaner should easily resolve any differences of opinion on that score.
Have I told you what you want to hear? Shall I buy a hat? 