For me the entire learning aspect of it is fun. I like datalogging and testing, evaluating, and then seeing what effect my adjustments have compared to the original data. I'm weird like that, but it feels like a good hobby to me because I'm not trying to shoot for overnight perfection.
The underlying principle of tuning is correcting and maximizing the engines overall efficiency. In doing that you actually improve it across the board-fuel mileage, power, and safety/reliability. You can take it beyond that point by sacrificing one or more aspects for one another, but that's not 'necessary' and in reality should be avoided.
Even with bolt-ons there is a lot of room for improvement, so if it's possibly something you're interested in you should consider investing in some tuning literature to help give you a general idea of the overall process. It's pretty intimidating at first, but if you break it down into the four main areas (VE, fuel, ignition, boost) it becomes a lot more manageable. Cobb's OTS tunes and tuning guide/materials are a pretty good start point for both tuning and grasping some of the main components/monitors/adjustments of each area of the tune.
The underlying principle of tuning is correcting and maximizing the engines overall efficiency. In doing that you actually improve it across the board-fuel mileage, power, and safety/reliability. You can take it beyond that point by sacrificing one or more aspects for one another, but that's not 'necessary' and in reality should be avoided.
Even with bolt-ons there is a lot of room for improvement, so if it's possibly something you're interested in you should consider investing in some tuning literature to help give you a general idea of the overall process. It's pretty intimidating at first, but if you break it down into the four main areas (VE, fuel, ignition, boost) it becomes a lot more manageable. Cobb's OTS tunes and tuning guide/materials are a pretty good start point for both tuning and grasping some of the main components/monitors/adjustments of each area of the tune.