A. I heard Emerson, Lake, & Palmer and was blown away. Greg Lake is a highly underrated bassist. Chris Squire, John Entwistle, Jack Bruce, Geddy Lee,John Wetton, Roger Glover, and Michael Rutherford's early work with Genesis were huge influences too. Jaco Pastorius and Jeff Berlin also hit me like a ton of bricks!
McCartney was a huge influence also, as was James Jamerson. It's hard to turn on mainstream radio for any length of time and not hear something from Motown or The Beatles.