Joomla is great but I bet everyone has their own set of extensions that they always install on a site, I know I do.
This will either mean that you have to spend extra time installing them before you can get started on the real work or that you have built your own custom joomla install.
I've built several of them myself in the past and they must have saved me tens of hours.
It's relatively easy to do it but is in itself time consuming and of course you have to ensure that you keep all of the constituent parts up to date.
No I haven't gone mad and got my calendar wrong I really am talking about Easter Eggs. But not the nice chocolate type we get here in the UK or the painted bird eggs more common in the USA.
Instead I'm talking about the hidden, often undocumented, commands buried inside software, dvd and even web sites.
Usually they are just an exercise in a talented programmer having a joke at their boss, but sometimes they can provide extra and useful functions.
And sometimes they strip a joomla designer naked!!