Pitbull - Unit frames of awesomeness... 'woof it'll bite your face off' says it all really.
nQuestLog, Lighthead & TomTom - All for quests.
Trinity Bars - Tried Bongos and some others but I feel this is the best replacement so far for DAB (Discord Action Bars).
Parrot - From same guy as pitbull, its the best scrolling Combat Text addon IMO...

But basically its taken on and off three years to arrive at a set of addons that I like.