You see requests in the connections window or upload window? Connection window (accessed via Tools menu -> Advanced Tools) lists what ultrapeers you are connected to.
If you mean incoming searches to the bottom-left of connection window, no you cannot preview via clicking any of those.

* If you do a search, your own shared files are excluded from the search results.

If wishing to search images, it is probably best to change the search to 'Images' type of search. If it is listed as Audio or Video type search then images will be filtered out of search results.