My attitude area tag team and just before that would be legion of doom/ road warriors.... just tenacious, i remember there debut on nitro... at only around 15 i marked out huge for them. From the mid to late attitude area til about 2003 it was the Dudley Boys, and the Hardys in a dead tie. Dudleys were the leaders of extreme and brought that in to the E, and then the Hardy's took that chance at going extreme and ran with it. E&C are second to those two tag teams. in between 03 and 07 i dont really have a tag team because the division sucked in general. After 07 through now my favorite team is the Motor City Machine Guns. There just a great tag team and they work excellent together. Not to mention their X-Division backgrounds. And they will take on any one any where at any time. There a big reason why i watch TNA (besides Sting). Im saddened they are not featured more prominently on the show tho.
Now my honorable mention teams are as follows-
Pre 97- The Rockers, Midnight Express, Sting and Luger, Mega Powers
97-2001- Outsiders, Vicious and Delicious, Steiner Brothers, Harlem Heat, Wrath and Mortis
01-03- Eddie Guerrero and anyone, kurt Angle and anyone, E&C, 2 Man Power Trip, (not sure if there in these years- Brothers of Destruction).
04-07- NONE
07-now- Beer Money Inc, Lethal and Creed, Hart Dynasty(growing on me), Miz and Morrison, JeriShow, ShowMiz, and quite possibly if it happens Jeri-Miz.