I've found that "questioning your faith" is often a euphemism for trying to hold on to things you know you no longer believe, but would like to. It's a polite way to communicate that you're still sympathetic to the ideas, but need to work through your doubts.
I believe that a faith which isn't frequently tested is essentially fake. For instance, there are a number of doctrines which have no practical application but on which people hold strong views. Because the beliefs are never exercised, I don't really think they're issues of faith - they're pet doctrines. These are the bread and butter of debates, because debate is the only way you can reinforce them. If you can't live them, you might as well talk about them.
I say this because actual faith is tested every time it is exercised. Every time one acts in accordance with her faith, there is a moment in which she could choose not to, in which she could easily regress. It's not in conversation that actual faith is really tested - it's in the living of it.
