I know a handful of you guys are photography buffs so I want to create a consensus or discussion on what styles of lenses you use, and why. I'd really like to avoid taking this to a debate of "35mm film vs 4/3 vs compact vs SLR" etc. This is strictly for dSLR users, full frame or crop sensor. So if you would, please post your GO-TO lenses you take hiking. The reason I'm asking is I'm trying to find a happy medium for taking a single lens that will cover all my bases.
I use a Sony A57 SLT. My current lenses are 18-55mm kit lens, 75-300mm f/4.5-6.5 and f/1.8 35mm prime (only 4oz!). I opted for the A57 because it's light, does HD video with manual controls and continuous AF. I hike with the 18-55 kit on it because it's decent quality and if it breaks, no loss. I keep the 35mm 1.8 in the pack for low light and the zoom lens doesn't usually go because 75mm (or 100mm on my crop sensor) is way too narrow. In the woods I don't want to switch lenses unless absolutely necessary though. I like to shoot wide panoramas and landscape shots but I like to sneak macros of insects and critters in when I can. I have not found a perfect go-to lens yet, which is why I'm asking what ONE lens you'd take if you were limited to one. Thanks in advance.