Is there any meaning to the type you wear?
I've been looking at them, and really like the black knitted ones, but no one at my local synagogue wears one. They mainly stick to white/light colored ones with decorate rims.
Formally, there's no meaning that differs by type.
Informally, the type you wear can sort of indicate your level of observance or your community. It's a fast and loose rule, and to some extent a matter of joking, but there's a grain of truth in it.
Knitted kippot of a small to medium size, if colored, usually indicate right-wing Conservative or Modern Orthodox affiliation.
Knitted kippot of small or medium size that are black usually indicate right-wing Modern Orthodoxy.
Very large knitted kippot, or giant kippot knitted of yarn usually indicate baalei teshuvah ("returned" or "born again" Jews, who have been secular, but have become Orthodox) through Breslov, or sometimes through one of the "hippie" Orthodox yeshivot (seminary schools) in Jerusalem or Safed, in Israel.
Smallish, flat, black kippot made of suede or leather or stiff cloth are usally indicative of a centrist Orthodox Jew, somebody who went to Yeshivah University in New York, or one of the non-Hasidic yeshivot in New York or New Jersey.
Medium-size velvet or silk kippot with embroidery are center Orthodox, but they are individuals who have a little sense of flair.
Big velvet kippot, especially black or brown, are old-school right-wing Orthodox. Old guys like them, but young guys who are frum (Orthodox observant) enough will wear them, too-- sometimes underneath the proverbial Black Hat.
Cheap nylon kippot, of the sort distributed at bar/bat mitzvahs, or otherwise at shuls; or cheap cloth kippot, of the same general sort, are usually the mark of left-wing Conservative or Reform Jews, who don't purchase their own kippot, but collect a couple from shul occasions for future ritual needs.
There are those who break the nuances down even further, but that's a general idea....
