Here are pics

Single hungs and sliders are commonly used together here in Texas, and they look fine together.

The ones in the front are basically 53 by 63. Here is the window schedule. My concerns are: 1. Can horizontal rollers and single hungs be used interchangeably or does the home look best when it's one style window? 2. If I keep single hung in the back, do I do single hung for the other 53 by 63 window in the back left or do I make that match the front windows? If it's horizontal roller and the other back ones are single hung, will that look bad from the back yard? I can change sizes and styles right now so please tell me what will look best!