I like how they're a different kind of way to catch Pokemon than just battling them like normal. I found the encounter rates for specific Pokemon to be too low and have them run away too quickly, but I think it's a great idea they could've spent more time fine-tuning. I like the way the Hoenn and Sinnoh ones were laid out, and the daily Pokemon in the Great Marsh made it a lot more interesting to me. Those daily encounters are one of the first things I think of when Sinnoh comes to mind, and it's unique just for that. Overall, as someone who goes out of her way to catch everything, I don't mind it but I do think they've had multiple chances to try and improve upon it.