I chose the gun due to its unique design and transformation challenges (Classics Megatrons asymmetry is cool). If there were a squad of gunformers I wouldnt care for Megatron to be one but as it stands we get a lot of land and air based alt modes. The symbolism is perfect as well. I enjoy most other Megatron alt modes (barring the Cybertron batmobile) as they usually carry that same deathdealer vibe.