Wynne isn't religious. I don't know why everyone thinks that. She respects the doctrines and reveres the history represented in the Chantry's relics, but considers a good deed worth more if someone doesn't perform it for a spiritual pat on the head. She actually has a banter with Leliana about the whole thing. She distinctly states that she doesn't really think much about religion at all.
For me ...
Dog: I absolutely LOVE dogs, so we'd get along very well

Though I'd find his brutal combat tendancies a little offputting, I'll admit.
Alistair: I think I'd like Alistair a lot, actually, which is interesting. He's possibly my favourite character in the game, and I tend to dislike my favourite characters projected into real people. But Alistair is so funny and adorable and well-meaning and earnest and sweet, and his flaws are things that I'm already used to dealing with. I think we could get along fairly well, though his lump-headedness would eventually get on my nerves. I need cerebral conversation.
Morrigan: I don't even know, man. I've been close friends with meaner people than Morrigan, and I think I could connected with her abrasive personality hiding a very vulnerable centre. She's also intelligent and fierce, which I respect in people. Buuuuut she'd be really hard to get to know, which I don't have a lot of patience for, and I can be pretty thin-skinned.
Leliana: One of my favourite characters in the game, but I'd really hate her irl

She's so over the top girly, so incredibly religious, judgemental, not always entirely trustworthy, insanely jealous even in friendship ... these are all things I love about her character, but personally? Ehhhh.
Sten: There's really nothing to like about Sten irl, imo, other than the fact that he knows how to give someone space.
Wynne: Wynne's another of my favourites, but I doubt I'd like her personally if we met in real life. She's very wise and very good at telling you things you need to hear, even if you don't want to, but I'm easily defensive and some of her talks with Morrigan, who I have a bit in common with, imply that she couldn't care terribly much for ME, either.
Zevran: I love him in the game, but lol, I'd hate him so much in real life. I hate that sort of smug, overly sexual, piggish guy who acts like he doesn't care about anything or anyone.
Shale: Shale's a hard character to judge for this. The initial aggressive, bored, borderline cruel Shale would be pretty hard for ANYONE to get along with, but the Shale that emerges after you finish her personal quest and start connecting with her, I could see myself being better friends with than anyone else in the story, actually. Gofigure. She's so dry and vaguely self-concious and sort of desperate for a place ...
Oghren: Definitely wouldn't like Oghren much. I have a natural predjudice against addicts and Oghren is definitely an alcoholic. His overly repulsive sense of humour is hilarious in game, but would make me uncomfortable in real life.
Loghain: I don't even know, dude.