wow - 10 minutes before bumping and when posting in the wee hours!
your portfolio should be an example of your work, so put in it the genres that you shoot
keep your portfolio in the proportion you shoot - so if you do twice as much macro work as landscape put in twice as many macro shots
try and show variety within genres - don't just have close ups of flowers, try some bugs, still life, and some abstract macro - try to expand the portfolio by working on projects that you wouldn't normally do