The biggest thing to look at is the motor start ratings on your equipment. Many heat pumps, well pumps etc have a soft start on them that ramps it up instead of dropping the whole load on start up. If you have modern/ “better” equipment in your house you should be fine. Do a quick load calculation on what the motor loads are and size your generator 20-25% larger, you should be good. The biggest hits are heating/cooling and auxiliary pumps (well, sump etc). Lights and modern refrigerators are pretty negligible, but if you have a 20 year old freezer sitting around, beware of that sumbich undermining the operation.
Brand wise, I have no real advice, just be aware, you don’t really want your finer equipment running on the “dirty” wave pattern a cheap generator puts off so if you are big into higher end electronics/smart home stuff, you should try to seek out a higher end generator that Is closer in frequency to your typical home electricity. This is where the inverters are great their wave form is nice and clean, but they are also expensive and typically small output.