I’m not really an expert to discuss film simulation here. Anyway, here are a few links for you to read up and compare the difference between different film simulation:
For general shooting I’ll stick to Provia. Occasionally when I do streets or documentary kinda style, I’ll go for Monochrome or Classic Chrome. When shooting portraiture, my preference leans towards Pro Neg Hi or Astia. Well, these are just my “usual” preferences. Of course there are times when I’ll do the unusual such as shooting landscape in Monochrome + Red filter and etc. Velvia is not my preferred film simulation, somehow… Occasionally I’ll use it when I shoot landscape or nature, but most of the time I’ll end up toning down the colour saturation as often I just find them too overwhelming. Again, these are my preferences, do try out all the simulation and see which one works best for you.
If you shoot RAW, you can convert into different film simulation in-camera via the in-camera RAW converter. Otherwise, you can decide later in Photoshop or Lightroom when you import your RAW files (Note that you don’t get to change the film simulation if you import the Jpeg files). If you are shooting JPEG only and you are not sure which film simulation works best, what can be done? There’s this function in Drive Mode called “Film Simulation Bracketing”. Once activated, the same scene will be shot with 3 different film simulations that you have predefined. You can select the one that works for you later on.
Film simulation is one of the reason why I was lured to use Fujifilm camera. Hope you enjoy using it as much as I do. Till then.