There are as many answers to this question as there are students applying to college. Some students enjoy the hustle and bustle of a large school, don't mind bigger classes, and are able to navigate registration and administration crunches. Others need a more personal campus where classes are intimate, services are easily accessible, and campus activities are easy to approach. At a larger school, it may be more difficult to access professors, a task usually easier at a school which has decided to remain small.
Personality is often a factor.
Outgoing people may enjoy a larger campus more, while quieter, introverted types often enjoy the socially less challenging small-school scene. The only way to know what is right for each student is to visit, talk to alumni and undergraduates, and research information from all available sources. Two year colleges are primarily occupational or pre-professional. They generally do not offer housing. Four year colleges award the bachelor degrees, and usually offer campus housing and extensive campus social and extracurricular programs.