Write about something that you like and that you know a lot about. Do not write a hub that is too short. The hub should be almost 1,200 words.
But if 1,200 words are hard for you, then write a hub in which you compare two (or more) different products/situations. This way it is easier to reach the 1,200 and you can even in the conclusion have a poll, where the readers can vote for their favorite.
Remember to add images, but do NOT use images that give you copyright problems. Use your own or creative commons.