I'll go with the A500+ for the worst Amiga... only because its my least wanted amiga... Me and the 500 have some History but the 500+ is like the cousin no one talks about...
The A1000 is not only the first Amiga but its my first Amiga too... and the Kickstart disks werent that bad just once when you switch on... not at every reset... plus you could get cracked kickstarts that had extra goodies.