We have stayed at most of the WDW resorts a number of times. Generally, I would be happy to return to any of them.
But....
When I decide on a hotel I tend to look at the price offered, and compare that with amenities I want, or the ones that are offered.
For example, in the winter, we are less inclined to go swimming, so the pool is less important to me. In warmer months, I appreciate a fun pool. Pop's pool is better than the basic rectangle pool, but we enjoy the pools with water slides. Water slides are a big plus of the mods and deluxes, IMO.
If you are torn between two hotels, consider a split stay. We love doing split stays! With hotel prices as high as they are, to me it is a no-brainer to spend our first night at a place that is inexpensive. We also love the variety. The small trick is to minimize unpacking that first night. WDW will transfer bags between WDW hotels, but we usually have a car, so we just use bell services or leave our bags in the trunk. WDW also allows you to check-in in the morning. Sometimes the room is ready early, often it isn't.
Overall, we like Pop, and would stay there again. The only downside of Pop, IMO, is that it doesn't have a table service restaurant.
It isn't a big deal, but if you want table service meals, you have to go some place other than Pop.
There are also a few small amenities I miss when we stay at Pop. We like our hotel room to have a shaving mirror. We're also not fans of the very low flow water at Pop. The theming is cute, and the new Skyliner is a fun transportation option.