I'm with PieExplosion here... redstone, aluminium and copper cables are plentiful, and so is glowstone dust. Lapis lazuli you could argue is valuable thanks to GregTech's abundant usage of lapotron crystals, but I still end up with a surplus usually. Especially if I luck out and enchant a Fortune pick.
By contrast, enderpearls are not only tedious and difficult to get (particularly if you have not yet found The End and are not decked out in full quantum gear), but they're also required for other interesting things in ridiculous amounts. Take iridium-neutron-reflectors. They make your nuclear reactor awesome and are completely indestructible, much in contrast to all other neutron reflectors. To make a single one, you have to macerate and centrifuge 128 enderpearls. Making four to completely surround an uranium cell, and you're looking at 512. Yes, that's 8 full stacks of enderpearls. Not to mention enderchests, portal guns and upcoming Redpower equipment that needs these things on a regular basis.
Nope, I'd much rather be building advanced circuits.
By contrast, enderpearls are not only tedious and difficult to get (particularly if you have not yet found The End and are not decked out in full quantum gear), but they're also required for other interesting things in ridiculous amounts. Take iridium-neutron-reflectors. They make your nuclear reactor awesome and are completely indestructible, much in contrast to all other neutron reflectors. To make a single one, you have to macerate and centrifuge 128 enderpearls. Making four to completely surround an uranium cell, and you're looking at 512. Yes, that's 8 full stacks of enderpearls. Not to mention enderchests, portal guns and upcoming Redpower equipment that needs these things on a regular basis.
Nope, I'd much rather be building advanced circuits.