Humor, wit, positive messages, but not for younger children.
Step by Step has very rare qualities. Part of the original TGIF lineup, it contains a bit of everything. The early seasons mix family friendly humor with good morals, making it a perfect show for all families.
Later seasons the show descends into more crass humor, as if it was attempting to cash in on the success and demise of Married with Children. (Only not quite that bad) The morals remain, but it no longer becomes appropriate for the tweens and under crowd.
It even adds adult eye candy in the form of Dallas veteran Patrick Duffy, and Three's Company veteran Suzanne Somers.
All in all, a funny and well-meaning show. Just keep an eye on who is viewing it.