In reply to eddy-on-the-rocks:
Pretty much all the corner climbs have cracks in them.
Anything with stars is a good start, if your looking in the book.
My personal selection:
VS The Black Hand & first pitch of road runner
HVS American Beauty (not all cracks, but quite a few)
E1 Indy 500, Dark power,
E2 Destiny (easy to access, once the ab is found) & hobs Lane (an adventure), Redspeed
E3 Wolfman jack (though a fair bit of face climbing around a crack).
If you just want good holds, then the 2 E2s at montagu steps also are fun.
I hear Milky way, Jetset & bender are good crack basedchallenges but have not climbed them.
Didnt rate quatermass, but that might just have been me on the day.
Lundy is great, finding the climbs from above is half the challenge. A long ab rope and some imagination also help. 100m Ab will see you into Redspeed from the top of the slide, American beauty/ road to moscow, Black hand (though a number of ab ropes will help here) and I recall Hobs lane also needed some approach thoughts.