Some of my favorites include the ones listed below.
So iLL
"The Stomach" ~ Although this is an easy hold, its perfect for setting interesting hand/foot matches. On a 45, this thing makes for a super interesting hold
"Wisdom Teeth" ~ very similar in setting features to "the stomach". Super fun on steep walls
Project
"Tankers 3XL 01 & 02" ~ No home wall is complete without a huge hold that represents a nice Hueco. Brings back memories of Martini roof!
"Shellshocked (Tempest)" ~ This huge bastard is super hard on anything other then vertical. This is by far the biggest and baddest sloper feature out there!
"Kreases (Scarface)" ~ Just because the Kreases series is so badass, this hold sums up everything about that line. Slopey, crimpy, and huge!
And if money permits, "The Growth" is as bad ass to climb as it is to look at!