Troi’s costumes were a curious thing indeed. Basically, the producers wanted cleavage on the bridge to get the randy nerds on board. This continued throughout the 90’s with the tradition of the great Trekkian catsuit. I still can’t believe that Kira got saddled with one, which always felt like an affront to the dignity of her character. But, I guess, after a while you just get used to these things and tune them out. I liked Troi’s bergundy/wine coloured costume from season two onwards. Of all the others it seemed the most professional. The blue dress just looked horribly out of place, with Troi slinking around the bridge looking like she’s got lost en route to the ballroom. That said, Marina Sirtis was so beautiful she could make anything look good. I did prefer it when she found the standard issue Starfleet uniform and kept her skimpier garments for off duty hours.