Coming back around for more? Alright then...
Tower defence games thus far have been simpler affairs, notably in the graphics department. I don't remember all the tower defence games the 1001 list has put in front of us, but the majority have been Flash-based lunchtime entertainment, not detailed 3D polygon models of animated alien invaders stealing chunks of our blummin' core, as is shown in Defense Grid: The Awakening.
Is a considerable bump in graphics enough to get me to pay more attention to the genre, or does the idea of tower defence just turn me off at its first utterance?