Next lens for my K-30: macro 35mm or macro 50mm?

Many thanks.  For people shots, 35mm is fine if you don't get too close - three-quarter length portraits, or pics which include some of the surroundings, but not so much head-and-shoulders.  In picture no. 4 (the girl drawing) her nose is slightly too large - an unflattering perspective effect starting to appear from being just a little too close (four or five feet I think).  For the couple (pic. 1) on the other hand the 35mm length is perfect.

Best wishes

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Mike
http://www.pentaxphotogallery.com/artists/mikeward