Caring for GUIDs
I've been meddling with WIX for a week now, which is all new to me. I'm forming a good opinion of it, though there is an awful lot to learn. It's straightforward to build simple installers for typical .NET apps, or websites. Installing Votive so that you have a WIX project in VS2005 is useful, but not necessary if you pick up a useful .bat file such as that included with the MCE WIX step-by-step guide which is actually useful for any project. You can make the choice that best suits you.
One thing that WIX needs is a lot of GUIDs for all of the components you want to control. I have an emotional attachment to GUIDs - I always feel like you shouldn't waste one (like when you press 'New Guid' twice on the tool) because it won't come around again, and get its chance to shine as an indexer.
Bizarre I know, but at least I don't have a favourite GUID (yes, I can point to a colleague that does).