Setsuna x konoka will be on the top without much doubt...
Negi x Nodoka and Negi x Yue are my favourite...
Nagi x Evangeline and perhaps some boy x boy pairings have a chance too...
i'd say Negi x Nodoka, Kotaro x President, Asuna x Evangeline, can't think of rest cus a lot of them like Negi
This is kind of difficult because there's not really enough guys to go around, haha. Kotaro x Kaede, and I'll go out on a limb here and say Negi x Ako. The other three are really a tossup. Negi x *insert any girl in the new club here* would probably be feasible. ._.
I'm pretty sure dowlaiswaram x Ku Fei makes the list...
but as for Negi, I would most like to see him with Nodoka.
I totally read that as "Dhalsim x Ku Fei."
The only couple I can think of at the moment that really strikes my eye is Konoka x Setsuna. They're just adorable.
Me x Ako XD
Okay, I'd vote for Kotaro x Chizuru (Negi just seem too pathetic most of the time), and Negi x Yue (at least they can think in the same level).