Which would you rather be chosen by; Mjolnir, Green Lantern Ring, The Wizard Shazam, or Galactus?
Be chosen by Mjolnir and become a Norse thunder god, or maybe by a GL ring and be a space cop that glows. Or maybe touch the staff and say the name of the wizard Shazam and become his protector of the Earth from magical threats. Or you could accept the burden from Galactus and become a herald who basically is a space God onto innocent planets' populations to feast on.
Which would you rather be chosen by?
The Shazam power is self-contained, and doesn't rely on external weapons or equipment. You get godlike strength, speed, durability, and flight, enhanced senses, and a special intellectual power to tap into if needed.
Now the only caveat is you have to answer to the wizard, and if he feels you are abusing his gifts, he can take them away as easily as he gave them to you.
Of course if you're a good, upstanding person, and don't let yourself get a big head, you'll be okay.