Same here. I am open to seeing one more Indy film though. I had a lot of doubts that the 4th one would be an good, but it turned out alright IMO. If they can get one out in the next couple of years (not likely with Ford getting to an age that he wouldn't be able to portray the character any more) then I'm all for it.
I'm definitely against seeing the next one (if one's made) being centered around the Mutt Williams character though. That really would kill it for me.
If they're making another one it has to be with Ford leading it, otherwise, they shouldn't bother.