The biggest problem we have with our TH which has a 30 amp service is that all of the wall receptacles are on 1-15 amp breaker. If you use an electic heater and a coffee pot at the same time, you pop the breaker.
I am in the process of making a second 30 amp entrance with two circuits. One circuit will be for additional receptacles in the garage and kitchen areas and the second will be for a second ac in the garage area if desired. By wiring up this second entrance, I will have the option of plugging into two 30 amp connectors or one 30 and one 20 amp using an adapter on the second cord or plugging into a 50 amp with adapter and 30 amp on the second. My last option will be to use a 50 amp wye adapter where two 30 amp 120v receptacles may be connected.
I agree with the others, if you have the option for a 50 amp connection, I would go for it.