Spain Solo Trip Review: Seville, Setenil de las Bodgeas, Segovia, Madrid, Barcelona, Cordoba

I would give myself more of a vacation. I was going all the time, and I wish I had taken a bit more time to sit at a cafe, have a cup of espresso, and watch people or catch up on some history reading.
Additionally, I probably would have picked three centrally located cities and used those as hubs. I moved from city to city, and hotel to hotel, quite frequently which made it stressful. If I were to do the exact same trip again, I would use Barcelona, Madrid, and Seville as my hubs and do day trips to Granada, Cordoba, and Costa Brava from there. 
Finally, I wouldn't have done private tours. As someone traveling alone, it was often awkward and not what I expected. Given the cost, I would suggest finding a small group tour with great reviews.