Okay, least attracted to is the easier question to answer here - Cups for sure. That overly romantic stuff really does nothing for me. Candlelit dinners, romantic movies, flowers 'just because' - blech! No thanks
There's also no way I could put up with the mood swings. I get enough of that from the toddlers at work.
Most attracted to is a bit tougher. I'm very much like the Knight of Swords (I place myself strongly in the Swords suit, but waver between the Knight and Queen). I tend to really like people like this but we can clash pretty badly. My best friend is also a Knight of Swords. We get along wonderfully about 60% of the time - the other 40% involve very heated fights! It's an interesting dynamic...
I like to be around the Knight of Wands for a short while, but find them exhausting. They're the kind of people I'd like as casual friends, someone I'd hang out with a few times a year. More than that would overwhelm me!
The Knight of Pents is probably who I'd most enjoy, but I don't really have anyone like that. I generally wish my friends/partners were more reliable and prepared - those are traits I really admire and respect in others. I could make all the plans, (s)he could carry them out - I see this relationship working well!
Overall, I think I'm most attracted to the Knight of Swords but wish I was more attracted to the Pents. Wands would come 3rd and Cups a distant 4th.
Sorry if that was a bit long-winded, I didn't realize I had so much to say about these people!