Fable 2 Guide - Expresssions
There are four areas you need to consider. Love, Renown, Hate and Humour. People like you when you perform positive or funny expressions, they appreciate your fame if you show off your trophies, but many expressions can be interpreted in different ways depending on how successfully hey are performed.
For example, the scary roar, if successful causes the target to fear you. If it fails (you can visually see the consequences of messing it up) they will merely find it funny – be aware though, it's not a particularly honourable thing for your would-be enemies to think you're a walking joke. Expressions are also extendable. This means that if you hold down the appropriate button on the D-Pad, a meter comes up. Keeping the button held until the bar turns green and then releasing it in the centre gets you the successful outcome and the best possible reaction from the expression. Releasing in yellow or red is still successful, but missing the bar altogether results in embarrassing failure. It's a risk to get the best results, but is often worth it.