mines on wheels and pretty portable, a non portable to me would mean like a automatic whole house unit. I take mine with me every trip up north wheeling( powers a welder nicely)The OP is asking about 'portable'. Some of the answers here are not portable in any typical sense of the word. Even the Honda eu2000i I own is tough enough to haul around, especially when the power is out.
One more experience story. As to easily portable, I bought a Champion 2000w inverter generator 4 years ago. It's quiet but not as quiet as a Honda or Yamaha. Only used once for a power outage just to power the fridge and freezer for awhile, but used about 50-60 hours over 4 days each year during the last three years for camping during a music festival we enjoy, and will be used again later this month for the same thing. It uses about 5 gallons of gas for that number of hours of use. Flawless in operation. Main reason for getting this was for the computer and electronics during a possible long power outage; also to run the circulators on my shop heating system if a long power outage during the heating season, but this has never happened yet. The circulators buzz when run on a non-inverter generator.
Also have a Craftsman 5500w - 240V generator on wheels that plugs into a 10 circuit transfer switch on our main panel. I have had this for many years. It gets used for a few hours about once a year during a power outage. The 240V is needed for the water well pump. This generator is quite noisy. It also has enough power to run my 240V MIG welder, so my welder now also is portable, a real plus.
For both generators, premium non-ethanol fuel and Stabil, run the carb dry after use, exercise each on at least a 1/2 load 1-2 times a year.