Yes, Seville is worth 3 days, but not in July or August

The Alcázar, cathedral, Santa Cruz and Triana are all walkable

Flamenco is a living art here: tablaos in Santa Cruz and Triana

Tapas standing at the bar: two or three dishes, then move on

Queues are the downside: book the Alcázar and go at opening time

No sea: Seville is inland, on the Guadalquivir; Málaga is the coast

March to May is when it is most worth it: who it suits, in the guide