Aliphatic wood glues (Titebond II is preferred) are ideal. They're stronger than all but the most exotic woods, clean up with water, and don't generally cause allergic reactions. Use them for anything and everything, including firewalls (but make sure they're well-braced with wood, because aliphatic doesn't make structural fillets like epoxy can).
CA glues are just as sensitizing as epoxies (but a different allergen), and are generally awful to be around unless you get low-odor types. But they're fairly strong and very fast. They're probably also the best substitute for epoxy when you're laying fiberglass wing root reinforcements.
Urethanes like Gorilla Glue are messy and not quite as strong as aliphatics, but they expand to fill reasonable gaps. They also work magnificently on foam.
Those three are pretty much all I use, in order of preference. I also use epoxy, but only very rarely. Most planes I only mix a single batch, for mounting the firewall, and occasionally for potting blind nuts and barbed hinge points. But the firewall can be done with aliphatic, the nuts with CA, and the hinges can be swapped for a different type or installed with thick CA.
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