Personally, much as I love to see single casks and limited editions, I also love to see a good wide core range of different ages and expressions. I'd love to see along these lines someting like:
A regular 15yo and / or 18yo Connemara - I think the Connemara is ageing really well and I really like the 18yo amontillado finish. That might not be possible as a regular release but a good quality 15/18 should be.
A regular 14yo Tyrconnell - of all the single casks I've tried I thought the 14yo from a few years back (can't remember which one) was outstanding.
A 12yo high malt content (70/80%) blend with some (maybe 25-33%) sherry cask?
For less regular bottlings:
An older (maybe 16) madeira finish Tyrconnell?
And I can't wait to try a 21yo Connemara - I've yet to meet a peated 21to whisk(e)y I didn't like!
That's my dream list, for the moment!
Oh and I almost forgot..
