Direct from Dibu Ojerinde, Head of JAMB

Out of 1.4 million candidates that sat for the examination, a total of 99,195 chose University of Lagos.

Other universities with high demands include Ahmadu Bello University, Zaria, with 89,760 applications; University of Nigeria, Nsukka, 88,177; Nnamdi Azikiwe University, Awka, 84,719; and University of Benin with 80,976.

More here http://www.guardiannewsngr.com/index.php?option=com_content&view=article&id=52432:poor-performance-trails-jamb-result&catid=1:national&Itemid=559

So preference is in that order:

Lagos (Yeah! Where  Nigerians from all walks of life cohabit)
ABU
UNN
UniZik
Benin

Where is U.I and Ife among the first five? Looks like life is ebbing out of them faster than some would admit.
African Universities ranking http://www.webometrics.info/top100_continent.asp?cont=africa