Ziggy!!!!
I've been re-watching the whole series from the 1st season on the Android box... I have to say that I had forgot about Dan & Roseanne's old friend Ziggy (season 3). It seemed at first, that maybe Ziggy's character was going to be permanent thing - Opening the bike shop with Dan....the way he asked Jackie if he could be her roommate, and her agreeing and discussing him splitting the bills and rent if he was staying...
I really loved his character... it's a shame he didn't stay around longer... I just had the feeling that maybe originally, he was supposed to me more of a re-occurring/permanent figure. it's too bad it didn't turn out that way...