I've found that when I photograph people, regardless of the format, then using strobes really helps 'freeze' them.
albeit, if you have a 2k arri or redhead(M.R.), that gives a nice bit of light at any distance. But they do certainly live up to their name "hot" lights are definitely hot

!
if you're not shooting anything moving, go out to home depot or your neighborhood hardware store and buy some of the clamp-lights, get the 300w maximum ones. They don't have any control over where/how the light falls(unless you use some cinefoil to re-direct it), and you can't dim them without using nd gels, but they work very well as a "starter" light to get yourself going. And they're super cheap too

!
or, if you're careful, you can get some great deals on used Mole Richardson(or even Arri or Lowel) lights on ebay. Try renting them if you can before buying.
personally, I'm a hot light guy(if I can choose, and subject permitting), but for color work, since there really isn't any tungsten film around anymore, and I don't feel like gelling lights or my lens, I use strobes(friend's profoto packs/heads).
-Dan