Bets was by far the most stunning. She had natural beauty. Too bad she was such a pill. I thought his 2nd wife (Megan) was hideous. The only other attractive one was that young girl Joy he met while in California.

Suzanne

We'll never know if he did but the brunette girl at the end of the bar at the end of season 5? 2nd is Betty then it's a tie for 3rd with Rachel and the school teacher.

Either Joy or Bethany, if you count oral sex for the latter.

You did just fine, Clarence. Now go get yo'self some hot cornbread!

Suzanne (Abigail Spencer)

The characters didn't seem to have any issue with it at the time.

C'monthe threesome?
was embarrassing and cringe-worthy for everyone involved. Including the viewers.

http://bit.ly/1bggYnC

I'm apparently the only one, but I've gotta go with Megan. C'monthe threesome?

Betty was probably the prettiest, but she seemed like she'd be pretty boring in the sack, therefore, not the "hottest bang" in how I'm defining it, hah. I'm going to go ahead and say it's a toss-up between Rachel and Faye.

Don didn't love himself.

Faye Miller. I also liked her the best out of all of Don's women. I couldn't believe Don just let her go like that.
Wendy? Darling? Light, of my life!

either/or a looker.
Eat the Neocons.

Yeah, the song implied that she was Japanese. Was the restaurant Chinese, or just the waitress?
She still looks more Japanese to me than Chinese, but coming from California, who knows?

Well the actress was born in California anyway, but probably Chinese, yeah. Definitely not Japanese.
Here it says that she is Chinese, although maybe not the most trustworthy source.

http://bit.ly/1bggYnC

I thought she was Japanese. Anybody know for sure?

One he didn't bang but wish he had was the Chinese waitress.. very attractive.
Played by Malana Lea.
http://www.imdb.com/board/20875025/?ref_=ttfc_fc_cl_t36
Seeing more of her would have been cool
Eat the Neocons.

Based strictly on looks, Betty. If you consider other factors, Rachel

Midge had the sexiest nose so It would have to be her and the waitress in the last series.
Marlon, Claudia & Dimby the cats 1989-2010. Clio the cat, July 1997 - 1 May 2016.

Rachel was always one of my favorites of Don's women.
Unless Alpert's covered in bacon grease, I don't think Hugo can track anything.

I found all of them to be unlikable.
I ate this blonde Texan bitch.

If nothing else, I loved that she called Don out on his beep at the end of their relationship.
She did that right from the start. In that "make-up" lunch she agreed to have with him after their first abortive meeting when he was cynically talking about love and how it was just a construct people like him made up for people like her, I loved when she looked at him in a considering way, and calmly said "Is that right?" Then proceeded to go straight to the heart of his BS and bust him.
Rachael was without question my favorite. She had intelligence and depth. I always enjoyed the scenes with the two of them when they were really talking.

Bobbie was pretty hot too in her own way, but it's always still Rachel for me. If nothing else, I loved that she called Don out on his beep at the end of their relationship.
Unless Alpert's covered in bacon grease, I don't think Hugo can track anything.

What about Bobbie Barrett? Perhaps not hot in the young sense, but she was mature and randy. She could hold her own with Don. She seemed to like getting tied up until she realized he was leaving!

"I'd say Dr. Faye. She would have also made the best long-term relationship for him. So that is a win-win."
In answering this question, what is meant by hot? Hottest looking, or most overall attractive? Or, viewed subjectively or (to the extent one can make this analysis) objectively?
In terms of one's static appearance, viewed by common standards of beauty, I think Betty was the most attractive looking. I am even tempted to say by a lot (although for a minor character the stewardess was closest in appearance). And fwiw I think the creators of the show saw it that way, since the show's narrative arc in some respects and as concerns Don's lovers was one where he started with Betty, so "objectively" attractive, his wife, the mother of his children, and ended up throwing that away. That he had some reasons for doing so does not change that it was tragic that they ended, and one of the show's most poignant moments was their phone call in the penultimate episode.
But from my perspective the most attractive was Faye. She was certainly very good looking. But she also had a self confidence that was a bit lacking in Betty, and was more Don's equal in terms of intelligence and accomplishments.
Part of Faye's presence in the show I thought involved a feminist angle, that what men thought they wanted in the fifties and early sixties - a stay at home wife - was not really as interesting or involving as someone like Faye was. We see Faye as something of a vanguard of many women today. Don is seen as recognizing Faye's persona as an attractive one, but he ended up sort of regressing by taking the younger and what was perceived by him to be LESS challenging Megan (even if she ended up being too problematic in the long run). The business of Faye not getting along as well with his children I thought while a consideration ended up playing out as a kind of excuse not to go with the woman who would have been better for him, and let's face it he better for her, in the long run, than not only Megan but all the other women.
So for me it was Faye, and I would also acknowledge Rachel was similar in that respect, so I don't disagree with those who voted for her.
And finally I also found Allison (his secretary) very attractive. But I did not think she was relationship material, if you will, as Faye clearly was. One of Don's biggest mistakes was choosing Megan over Faye.