Revolutions can be dangerous, if i recall right, weirdly big despotic cities can get unlimited garrison happiness which goes away and needs to be replaced by luxury tax on republic. Usually monarchy is a good first tech, but if your tiles max out at 2/2/2 theres no point.
Usually you always try to get two bonus resources on your first cities to offset that, then on later cities quickly build improvements and buy buildings and have big cities send food caravans (when no wonders are important) and build settlers/engineers to join til 5 pop.
On the other hand democracy is good for counter espionage and corruption, bad for staying in wars - much like the forever war on reddit showed.