I will talk about two of our recent proposals for quantum computers based on superconducting JJ circuits  and spins in semiconductors : what motivated them, why they are worth pursuing experimentally, and directions for future research.
 Semiconductor-inspired design principles for superconducting quantum computing, Nature Communications 7, 11059 (2016)
 Charge-noise-insensitive gate operations for always-on, exchange-only qubits, Phys. Rev. B 93, 121410(R) (2016)
Lincoln Laboratory, Boston, MA