The problems with giving characters possibilities that aren't available to the reader.
Category - The Work
On the words you choose and the style they imply.
Should you set your book in a generalized or specific time period?
Should you choose a setting that actually exists, or make one up?
Just because you're setting your book in "the real world" doesn't mean you get to skip the worldbuilding process.
What do you choose when your choices are limited?
Don't let your desire to buy plants convince you that you need to write a successful young-adult series.
Don't let your fantasies about THE LIFE get in the way of THE WORK.