Much hay is made of the concepting of Batman villains, especially from 60s TV series ft. Adam West. It's done within canon, even! The Condiment King was created for the 90s animated series as a play on those kinds of whimisical, pun-focused villains. He shoots sauce and says things like "You just don't cut the mustard, Batman!". Maybe when you have to put out at least one issue a month, you throw a lot of villain spaghetti at the wall and see what sticks, and once something does you then go about making "guy who has a thing for the calendar" more of a rounded character - a sinister dude with a weird backstory. Or you make him the world's greatest wife guy.
Mr. Freeze is, was and will probably always be my favourite Batman villian. Sure, he brings the puns as a 60s baddie, but he got his tragic backstory in the 90s. Turns out his whole deal is his drive to save his terminally ill wife Nora, who has been both metaphorically and/or literally fridged (depending on the version of his story) as motivation for him. This has been used to great effect in many adaptations, painting Victor Fries as a much more sympathetic figure all round. In the Harley Quinn animated series (which is very good) this is really brought to the fore, and he's presented as less a villain and more a victim of circumstance.
Mr. Freeze is, in effect, a classic wife guy, a vintage brand. He was a wife guy before it was, if you'll allow me, cool. "I love this woman and her curvy body", but what are you doing to preserve that body for years to come, huh? If you love your wife so much why haven't you frozen her? This is perhaps unfair on the Curvy Wife Guy; we might not all choose to cryogenically freeze our dying spouse and then do crime to fund the research, but also most of us haven't had the chance. It might be that the lack of resource and relevant doctorate is all that's stopping us.
Related: Mr. Freeze is also a humble king. He has a PhD, and could force us to call him Dr. Freeze, but he does not.
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