Having recently travelled around in Spain I must say I was TOTALLY impressed by the fact that every town I visited seemed to have a super-efficient form of public transport and offers you savings with a local card. This is similar to the Oyster card now introduced in the UK London area. However, although all these cards can save money as you travel the Spanish ones are very cheap compared to the London system.
I particularly like the way that often in Spain if you take two or three trips within a short period of time they will count as one journey (and thus charge) 15-30 minute periods being operated in the Alicante, Barcelona and Valencia areas. And this applies to buses and trams in many towns as I am sure it applies in many places in Spain This is great if like me you are on a hop on/hop off type of exploration and you want to quickly see what is there without having to take the official hop-hop off tourist bus (which often works out dearer and is usually limited to a 24 or 48 hour period only).
Oh and circular route buses? These were great as they mean you really have no way of getting lost and going so far out of your way because they all bring you back to where you started (eventually)
In respect of the RENFE (Spanish railway system), my host in Tarragona advised me that in Spain if your train is delayed arriving by more than 15 minutes you get another free journey on that route! We could learn from that I think! I was actually delayed leaving Tarragona so thought that I may be lucky with that one but we made up time en route by not stopping at one station altogether and having a shorter stop at another!
Never mind, maybe next time I am transported back to and around Spain.