Price, of course. Prices are expressed in cents/kilowatt hour. Plan types include fixed rates and variable rates. Fixed rates offer consistency throughout the plan term, which can run from six to 36 months. Variable rates can change monthly - they're great when prices go down, but not-so-great when they don't. Finally, if you care about your carbon footprint, you may choose a plan sourced by solar or wind energy.
Although electricity prices in the UK aren't cheap some countries have it much worse. In this article I'm going compare internationally to look at who is paying more $/kWh for their energy. I’ve gathered some numbers and crunched a little data to see who is really paying a lot for their power. For my neighbour here in the UK I’ll add a bit more data at the end.
Then, in 2002, Texas deregulated the electricity market and everybody cheered!  Except that, sure, deregulation opened up the market to competition that may (or may not) have resulted in lower rates, but it introduced a whole host of other issues.  These issues may not have been factors before but now they’re critical when you’re on the look-out for cheap Houston electricity providers.