I've always quite liked Pulaski. She wasn't particularly nice to Data at first, but she didn't understand him properly. In later episodes such as Pen Pals and Samaritan Snare, she had come way past that attitude, which was commendable. I also enjoyed the relationship she had with Worf.
It's a shame that she was essentially a McCoy clone, as she had some decent stuff to do during her short stay. S1 Crusher vs. Pukaski is no contest - Pulaski wins hands down. Crusher became more interesting as the series went on.