If you could only have either a lot of hair options, including good looking long hair, but only one or two different outfits, or you could have the hair options we have now but a huge variety of good looking outfits, which would you choose?
For me, it's the outfits. I'd love to have long/better hair options, but I'm way more interested in the clothing, personally.
Hmm... I'm inclined to choose clothes over hair, but that's probably because I didn't like the non-uniform casual clothing options that were available for me. I probably would have been much happier with them if I had the N7 hoodie or jacket that male Shep had.
For clothing, how about:
-- Dress uniform, a couple of non-dress uniform options.
-- Hoodie or PT (athletic) gear, preferably not so form-fitting as Ashley's hospital tee or Vega's.
-- Dress civvies. I'd like an option for females that is not a dress or skirt with heels.
As for hair - I've sort of learned not to expect Bioware to supply bunches of attractive hairstyles. I could be happier with fewer styles if we had a broader color palette for hair. The Sims 3 allows players to choose 4 colors from a rainbow color wheel - base, highlight, roots, and tips. I don't suppose we'll get customization to that extent, but I would hope they could provide a broader palette than what we've had thus far. My first character had very natural-looking carrot-top red hair in 1&2, but that color was not available in ME3, so she had to have a dye job.
So - if a lot more hairstyles aren't going to make it into the game, I would hope for more colors.