Well, since you said God!Dean has become an obsession, I guess you already read the Holy!Dean series (http://archiveofourown.org/series/29357)?

for Angel(ish)!Dean: (I didn't check with the other rec lists, so I might repeat something, sorry^^)
Lets Try This Again series (http://archiveofourown.org/series/37565): "A different take on what could've happened during season 5, where Dean's head goes kinda funny after Lucifer's Cage is opened and he has to decide what to do next."
Fusion (http://archiveofourown.org/works/3992446): Neither of them say ‘yes’. Everybody dies. Even the brothers die. And yet somehow, the pair go on breathing. AU Season 5 - Post 5.11 [Michael and Lucifer won't let the brothers die until they say 'yes'. Eventually they have no choice, but even then nothing is going to drag them apart.]
Theodicy (http://archiveofourown.org/works/372584): "As before, as now, as it will be again, the first significant Act of Creation by God shall be to forge l'hosif-or, his best-beloved, the Morning's Star, the one who shall bring the seeds of light into dark places and fan them to flame."
Fortunate Angel (http://archiveofourown.org/works/259991): "Post-S6 AU where Castiel turns Dean into an angel so that Dean will love him. The thing is, forcing someone to "love" you isn't all it's cracked up to be when neither of you are who you were. The title may be misleading, it's not a happy fic. Spoilers through 06x22."
Glory Unto: (http://archiveofourown.org/works/526245) "Castiel makes his first angel."
Once A Vessel (http://archiveofourown.org/works/529335): "If Castiel is going to be God, he needs an archangel and he sees the perfect candidate to be recreated right in front of him."
Ángelus Dómini (http://archiveofourown.org/works/3984196): "You're a fucking dick," Dean says, right to God's face."
Sympathy for the Devil series (http://archiveofourown.org/series/34621): "After the final Seal is broken, Dean discovers that he's actually Lucifer. He's not really sure how he feels about that."
Secret Weapon, Secret Family (http://archiveofourown.org/works/1174171/chapters/3661550): "Six months before his vessel was destined to be born, Michael met with a time displaced Dean Winchester. Realizing that Zachariah's plan to make Dean consent will never work, Michael develops a different strategy. Because if demons can insure Lucifer's vessel agreement, he, the mightiest of the archangels, can deal with a simple human child."
Godstiel and St.Dean series (http://archiveofourown.org/series/79402): "Bobby is the first to move, which is hardly surprising, as he isn’t affected by the Winchester lack of self-preservation instinct gene which is so dominant in their family. He kneels, encouraging the brothers to do the same. Then they finally get with the program and begin to move, because Cas just made Raphael go splat, holy shit. +++ My episode re-writes, in a universe where Cas remained God, didn't release Leviathans on the world and almost explode (but he did mess up in other ways)."

These all look great :)