One more tip for frequent extractions: save the command in a small batch file so you can drag archives onto it. A line like 7z x -aou archive.zip auto-renames colliding files (file_1.txt style) with no prompt at all. The GUI extract dialog simply does not offer a saved default for the overwrite choice.
Small correction: the extraction overwrite switch is -ao, not -u. The GUI 'rename automatically' matches -aot, e.g. 7z x archive.zip -aot. But 7-Zip File Manager has no setting to make this the GUI default.