Right, we all know about the default bases and the usual spots like the balcony (transit), dead end tunnel (transit), elevator room (karith), up (uncreation). But there must be other good spots, right? If you know some, please post them here so that the gameplay may get a little more diverse.
My first spot is karith, outside. You know, between the default human base and the elevator room. As we all know from Uncreation jetpack based building can be very useful in avoiding tyrants.
It turns out outside on karith has some very nice properties for a sky high hummies base. First of all, there's that fire exit. The fire exit has a balcony big enough for a reactor, armory, medpad and spawn. Also one can shoot through the balcony (mostly). Attached to the fire exit is a ladder, allowing people without jetpacks to go to a lower level without taking damage
Second there are lot's of ridges to put stuff on. For example under the fire exit is a small ridge, where I've managed to put a repeater, not something you want to do under hasty circumstances though. And don't forget that buildings need very little contact with solid stuff, so you can build turrets on the edge of the fire exit. Look around for more building opportunities.
Biggest disadvantage: I haven't found a way down yet that doesn't involve losing at least some health. However it looks like those ridges might allow a lara croft to get down unharmed. If anyone manages to get down to ground level from the fire exit without using a jetpack, please post a demo.
Also this suffers from the problem of sky high building in uncreation: you'll hardly win with it. But when tyrants are in play a draw can be good too and at least this base gives you two exists usable by heavies.
