I have shared most of my recordings...both the ones with permission from the bands/artists and also the stealth tapes.
Even the smaller bands usually gets at least one or two happy people who appreciate that you recorded that particular band.
Lately I have stopped to tape these big stadium/big arenas kind of bands...because the security at those events are just getting harder to come by...and of all stadium rock bands I only like U2 these days...no more Guns N Roses or Rolling Stones for me...
I also tape alot more smaller bands with permission and that´s quite nice actually. They get a good tape and I get a tape that I can share if I wish.
I think you should share your recordings with other people because what will happen the day that we are no longer around? No one knows about your tapes if you don´t share them...but if you really don´t want to share them I respect that as well.
These days I usually put my tapes up on sites like: Live Music Archive, Dime, Traders Den, TS and Swisstransfer. In the past I also traded my recordings with other tapers and traders via one-to-one torrents.
Happy taping!
PS. If you still have your Public Service Broadcasting-tape...I am still interested :-)