I loved the idea of berry farming in Hoenn, even though I was never good at berry blending, but I liked it a lot. My secret base in Ruby was in Route 120 right beneath Registeel's Ancient Tomb because it was just a beautiful spot, and I could grow berries. Was super upset it wasn't there in the remake, but I found another spot I was okay with. I also thought the Pokémon Contests were interesting, and I was super proud of myself to get my Azumarill buffed in Beauty and win Master Rank. Never got the other ranks, though, but eh.
Other people use berry farming to get berries for competitive battling given their held items status. Liechi Berry I think was meant to be a bragging right for those lucky enough to see Mirage Island, but it boosts Attack, so farming it was essential.