Hell In A Cell really isn't anything different from 1980s old school NWA Cage Matches, which were always WAY more violent than anything WWE did back then. Likewise Elimination Chamber is just WWE's sanitized version of War Games.
Only certain types of wrestlers can do Ladder Matches. TLC takes that to a new level with the No DQ style violence and weaponry use, they are typically for me way more entertaining.
Still my Fav gimmick match is easy .... I QUIT - You have typically work under NO DQ rules meaning weapons, outside help, etc is all fair game, and you have to mix brawling with technical wrestling typically to force the submission. After the early 90s when main event stars starting losing regular matches via submission (almost unheard of in the 80s) this lost a bit of it's luster but even still the intensity it takes to pull off this match along with the brutality and high spots makes it an instant classic almost any time it is used, and due to the intensity required it's only pulled out for the most hated of feuds.
From Blanchard-Magnum to Hart-Austin and beyond, this match always delivers a great mix of emotion, brutal brawling, and (usually) at least some great technical skill. Plus the endings are typically classic. Who can forget Austin, blood dripping from his bald head, passing out from the pain after trying for what seemed like forever to escape Brett Hart's sharpshooter, or the unmitigated violence of Magnum TA breaking a wooden chair into splinters and forcing them into Tully Blanchard's head as he screamed in pain, or even more recent bouts like S-Slam 06 where a battered Ric Flair threatened to bludgeon Maria with a barbed wire bat if an incapacitated (but refusing to quit) Mick Foley didn't get up and fight or submit once and for and all....
Nothing beats a great I QUIT match, especially as a major feud ender.