Well I will not argue due to my lack of experience and training but think that the minutes saved have a psychological effect on the pt and family and think about the EMTs and medics in the back with the pt, you have a critical pt and you are sitting at a red light. I feel this is unnecessary.
You are clearly new. In time, you'll become sick of the wail of sirens and find driving with them very, very annoying(and pretty much useless).
As far as it being fun, if I were to bet, you will not find running lights and sirens 'fun' after doing it a few times.
As a medic sitting in the back with a pt(s), I often get asked why we aren't going through red lights, swerving through traffic, speeding, and all the other cool stuff that ambulances do on TV. I tell them, flatly, this isn't an emergency and that they are not used in non-emergent situations.
I'm not going to 'play' with the ambulance like I'm in Grand Theft Auto so that the pt can feel psychologically comforted.
Going through red lights, disobeying traffic laws, creating anxiety in other drivers, throwing people around in the back, and CREATING a hazardous situation is unnecessary.
When I drive lights and sirens, I drive no differently than when they are not on. Same speed. I still stop at all lights. I don't go off the road. I don't oppose traffic for more than a block. It's controlled. Just more flashy and loud.