Tone. It's all about getting the right tone from your guitar and amp and whatever effects you have hooked up. This is my cheater box. It's got gobs of cool effects and sound processors. It's all digital so it doesn't sound as good as a classic tube amp, but it's pretty cool for everything it emulates - Surf, Crunch, Tweed, Boogie, Vox, Tipton, Angus, Foxy are all just a few of the presets. Stacked is one of my favorites.
1/20th sec. f/4 iso 400