In reply to Offwidth:
Good suggestions above.
Would second Martell Slab at Tater Du especially.
Iron Bells at Porthguarnon, Hairy Cornflake at Carn Guthenbras, gaol themed routes at Botallack Head Zawn etc, etc. All great stuff that you might not have done.
Iain's suggestion of The Lizard is a good one, there's a surprising amount of low grade stuff, on good rock, carrying multiple stars. The stuff at The Horse springs to mind and yes if David will give you the script, be sure to check out Predennack Head.
I should really mention Trewavas. If you go, please give Foundation and Empire a go, details can be found on the UKC page. It really is very good and desrves more traffic - if I do say so myself.
Lastly, I would definitely think about doing the HVS Waltzing Matilda on Bosigran Ridge. It's quite new but one of the best routes I've done Cornwall (certainly the best HVS). Some say E1, but it's a lot easier than the E1 Gallipoli (on the same wall). Details on UKC and in supplement.
Cheers,
Tom
Post edited at 18:25