We decided against one due to our high water table in our yard (digging issues) and, even though it is not for diving, I have teenagers so I feel it would just encourage them to try it anyways.

They do make "deep end" liners that allow you to have one end at up to 6' deep. It IS intended to be non-diving. Check the different pool mfg to see which brands/models are intended to be used with the deep end liners because you will generally get good instructions there. The ovals with deep end require a bit of extra work due to the straps the run underneath so modifications must be made.

It is a personal preference issue and you need to decide what the pool will be used for, as you said volleyball, etc? or something else.