Personal is a subcategory of animate. All personal nouns are animate, but not all animate nouns are personal.
Animate includes all people and animals, and recently certain foods, sports, brands and IT-related terms joined that group as well.
Masculine personal (virile) is distinguished in both singular and plural, whereas animate non-personal (nonvirile) is only distinguished in singular.
Uczeń ogląda tygrysa (acc=gen).
Uczeń ogląda tygrysy (acc=nom).
That's my easy bridge to remembering oglądać, though it's a somewhat false friend: to ogle really means to eye up or stare at another person (maybe in a creepy way; maybe as a prelude to flirting). In Polish I suspect that the pejorative gapić się na... is closer than oglądać to ogle.