I NEVER say "g-d," "g.d." or "Jc" as curses.
I DO sometimes say "Harry is a big loser".
Also (with different vowel sounds.)
creep
sheet
beach (but not with "sonnuva")
And the big one:
Freak
This morning I was helping out with a children's aikido class, and something I didn't like happened, and I almost let out an explitive, but I was surrounded by miniature people, so I choked it off and said, "I almost said a wordy dird."
The next time something happened that I didn't like, I let loose with "shoes!"
Then I commented that that's a safe wordy dird when in the company of chillin.
I always resist the temptation to curse with anything stronger than "shoes" or "poop" (sic) in mixed company (that is, adult men and women).