He was also the voiceover on some Lexus commercials, I think. :P Any excuse to geek out!
I think he made Mora Pol out to be really interesting just because of the influence he's had on Odo. I wish he'd been on the series more. Oh well, that's what fanfiction is for.
ETA: What's interesting is they almost cast Rene Auberjonois in the role of Mora ala Brent Spiner as Soong, but for some reason they chose not to and Mora's role was expanded a little as a result.