Update See the reply from ysth, directly below. As to I don't know why that's "much better" (except it's obviously fewer keystrokes), but when a deity speaks, one should listen (and /me /msgd him a request to expand with an explanation) ysth's explanation and jonadab's below are in close agreement, with ysth pointing out that my suggestion in the next paragraph is subject to the same critique as offered in the last paragraph. Live and learn..and strike the next para!

In Super Search, at the option to Skip titles containing, you could insert "Re" (which will eliminate nodes labeled as replies, though it will return your homenode).

On the other hand, you could set the Show____nodes in Perl Monks User Search (AKA "Nodes You Wrote") to a sufficiently high value to encompass ALL the nodes you've ever written; and using a script, capture those and process -- perhaps using a match on the order of

/^\d+\sRe[:^]{1,2}/

against each entry.

But that does seem rather far from what you've asked about doing, and somewhat the long way around the barn, compared to the Super Search alternative.