Given that I discovered Trek with TNG and that my first ST RPG was LUG, I think it's no surprise for anyone that I'm another bland-Klingons lover...
In fact, my favourite Klingons are the ones in TNG's first seasons - very violent, but with this very alien code of honour that codified their violence. This was an original race, only based on violence - like Vulcans were based on logic. Klingons in DS9 were less interesting to me, behaving much more like drunken bullies (of course this might have been tied to the decline of their Empire they came up with at the end of the series).
Though so far no Klingon appeared in my games, I intend to give them TNG behaviour - violent, ruthless, but with this honour thing making them able of sudden and sometime surprising friendships.
And of course, Klingons always had ridges - though I came up with an explanation for that in another thread (it involves a Douwd getting angry and punishing the Klingons by giving them a human look ).
To each their own I guess...
"The main difference between Trekkies and Manchester United fans is that Trekkies never trashed a train carriage. So why are the Trekkies the social outcasts?"
Terry Pratchett