The LHC is no more designed to create black holes than my car is designed to splatter bugs. The production of MBHs would settle some major questions such as the existence of extra dimensions, and would give physicists a clear direction for further testing and development of theories. Given the fact that such collisions occur throughout the universe and do not produce anything of danger, of course they hope for MBHs. This does not mean they expect them, it would be a surprise bonus to the other research they are performing.

The LHC is designed to produce 14 TeV proton collisions and 2.76 TeV per nucleon lead ion collisions. One of the major reasons for doing so is to verify the existence of the Higgs boson, or give a lower bound for what is required to do so. This is only one of the experiments it will do, however. It will refine measurements and provide data for testing current and future theories. The knowledge gained may only be of indirect benefit to the average person, but the benefit is ultimately unbounded, the loss of stopping where we are is absolute.

These collisions do happen all the time everywhere in the universe, the conditions in the collisions produced at the LHC are not unique. Yes, natural collisions do produce temperatures 100000 times those at the core of the sun, and even higher. Temperature and energy are directly proportional. The LHC and other particle accelerators simply produce these events repeatably and reliably with particle types and energies known before hand, and inside the equipment required to gather the desired information. It is compared against the big bang because "temperatures reached in tiny collisions all around you that have been occurring since shortly after the beginning of time" is not particularly informative.

Personally, I hope for strangelets. My understanding is that they are positively charged and do not absorb electrons, but gather them in orbitals like normal nuclear matter. The positive charge prevents normal nuclei from merging with them similarly to the difficulty of fusing normal elements, the electron clouds allow chemistry. Custom-made hyper-massive elements! Perhaps strangelets could even be placed in arrays on silicon chips as computational elements, or coupled with a small ion accelerator to use the conversion of normal nuclear matter into strangelet matter as a clean and plentiful power source. I don't expect them, though.