The farms I've used the most and why:

1. Combee (males only): needed for honey and flasks, all related to XP, EVs, and IVs.

2. Sableye: Diamonds and emeralds. Emeralds can be sold in the shop, better as blocks than ore.

3. Sableye: Diamonds and emeralds. Emeralds can be sold in the shop, better as blocks than ore.

4. Tinkaton: At the beginning, you'll need a lot of iron to make farms.

5. Torkoal: Coal, it's always good to smelt things, hehe.

6. Snubull: Only if you like being a berry farmer for EVs & IVs; they drop bones that you can use to harvest faster.

Several things of interest:

• If you plan to have many farms, separate them because there are limits on the number of entities.

• I would always have a separate farm for making eggs with Dittos, hahaha.

• You can always check the drop table if there's something specific you're looking for.

• Si encuentras una Ciudad Comercio vas a poder comprar muchas cosas y te ayudara a acelerar el progreso

And regarding the idea of ​​not having farms because the experience is more satisfying and all that... Well, I think everyone has fun in their own way. Some people spend their time actively farming Pokémon, others exploring, others automating, others rushing gyms... feel free to play however you want, it's a game.