PPS decouples the payout from the mining and pays a set amount for each share, like Nicehash does,
Prop is pure pooled mining where everyone gets a their fair share based on blocks found.
I would agree that PPS is likely the best choice given OP's desire to mine on and off regularly. Nicehash is also a great pool depending on if your miner plays nice with it or not. I've found for GPUs, Nicehash works great and is very reliable. The PPS method will also make it so that you aren't being penalized every time you pause mining for a bit and a block is found.
I wouldn't go with the suggestion of trying out each different type for a day. Likely, pool luck would be the determining factor there. PPS is in my opinion the best way for you to go given your scenario, so Nicehash would be my suggestion for your given scenario.