Amongst hardcore coaster fans, Screamin' is a solid, but somewhat middle-of-the-road coaster.
http://www.ushsho.com/detailedsteelrollercoasterpollresults2013.htm
It's ranking (#113) is right around Everest (#110) but well behind both the "real" coasters at Sea World, Manta and Kraken, as well as the Dragons and Hulk at IOA.
I like to think of Screamin' as the steel coaster
sampler pack. It has a little bit of everything: a launch, a "traditional" lift (done magnetically, but at chain-lift speeds), a simple inversion, a run of airtime hills, and a twister section to finish. None of the elements are outstanding, but I can't think of another coaster that brings all of them together.