panglossian
Blindly optimistic, naively so.
That poor sod BazzA is acting somewhat panglossian about that lovely young lass...
pessimistic panglossian
one who thinks that this is the best of all possible worlds, and screwed up as it may be, can't get any better.
She didn't bother to get out of bed anymore, her pessimistic panglossian perspective made life seem pointless.
Panglossian
obnoxiously happy all the time. even worse than the most optimistic of Pollyannas
Kyle always had a very panglossian view of life, until the day he found out his middle name was Pollyanna!