Seymour, the SheBar sold electronics from 1999-2008 and here's a quick thumbnail
Plasma big screens often a better view for sporting events and movies with lots of motion or animation(action etc)
LCD a better overall picture for most other HD programming (TV series, non-action or animated movies)
Plasmas virtually impossible to repair when the teeny teeny gas bubbles break, as they will begin to do after a couple years. While one such break is virtually indiscernible, having multiples in same area creates mild fuzzy spots.
Plasmas physicall heavier and physically hotter when left on for extended period.
She favors Sony and Samsung for brands on either type, though there are several that can be reasonably given high grades.