for good reason: Romney is, as the politically correct say "tone deaf" - meaning he just can't hear how his comments sound to others. In the quote I mentioned, his response when asked about his wife's horse [competing at the Olympics, where Romney was at the time] sounds a lot like he doesn't care about his wife's achievement, like she'd just entered a pie in the county fair, right? It sounded like "I'm campaigning, and it's all about me!" My point is, that there's no doubt whatsoever that Romney loves his wife, and would not demean her in public, but that's exactly what his answer did, because of his apparently incurable tone deafness.
That's a huge factor to me - one of the POTUS' duties [and a very important one] is conversing and negotiating with his counterparts from all over the world. Many of whom are not just literally foreign, but utterly so: in appearance, dress, customs, language - how would Romney do at that , do you think?
Every time I envision Romney in a delicate conversation with an important head of say, a Middle Eastern country, it always ends in war being declared - on us.
Obama has proven himself capable of diplomacy [we need all the goodwill we can get!] and that's a huge plus in my book.