WWF 1980-1993
WWF 1993-1997
WWF Attitude (1998 till 2003, including 2003 too)
WWE 2004-2007
WWE HD era 2008
I think WWF Attitude(from 1998 to 2003) were the best.
I love 2003 with rock,goldberg,lesnar,batista,evolution and etc.
I like a lot 1998 with DX, NAO, The corporation, Ministry of Darkness and etc.
2004-2007 sucks. 2004 were not bad 2005, 2006,2007,2008 were the worst ever for the wrestling