Actually it depends on the requirements. First of look at your needs and then can find a suitable package.For me, Orcad Package is easy to learn & use. Its quite user friendly with almost all features required for complex circuits.

I've worked with Orcad, Tango, Protel, Eagle, Pads.
Pads is good for high density board;
Eagle is good for small and simple projects on two or four layers. 
Orcad is the best for editing schematics but not for PCB routing.