My list:
Real Madrid-Barcelona
Man.Utd-Liverpool
Milan-Inter
Are also some other Derbies like Benfica-Porto,Fenerbahce-Galatasaray,Arsenal-Totenham,Boca Juniors-River Plate etc.

I think Real,Barca isn't rivalry its classico

Every EPL match.

Arsenal-TottenhamReal-BarcelonaArsenal-ChelseaMan utd-Man CityBoca Juniors-River Plate

I hope I can watch Leeds vs MU in future at EPL.

Oh c'mon, the Manchester derby is not the best in term of quality, i would say the madrid one is.

If you talk atmosphere: Cracovia vs Wisła Krakow, Sevilla - Betis, Sampdoria - Genoa, Lazio - Roma, Milan - Inter, HSV - St:Pauli, Schalke - BVB, Djurgården - AIK, Brönby - Köpenhamn, Celtic - Rangers, Red star - Partizan (or almost every other greek/balkan derby).. also in the americas we have for example Rosario central - Newells Old Boys, Independiente vs Racing Club and Boca - River..

i mean England, the ultras culture is non-existant and the derby's seams like normal games, you cant tell on the atmosphere what game it is...

you cent get this atmpsphere in England:

^Well, we were better than Partizan fans in their own stadium.

you're right @Emrecan,i watched that game,you were great

Ofcourse Emrecan, cant forget about those turkish derbys....