I have also not used them in direct way in 3rd edition. Everybody was unaligned by default and mechanical alignment (one which was detectable/had mechanical effects) was only possible to gain due to supernatural forces. All clerics had alignment of their deities, wizards with imp/quasit familiars were getting a splash of evil, carrying some aligned artifact for longer period of time was leaving some aura on you - but it had nothing to do with your actual moral behavior.
In 4th edition, due to general lack of detection methods/mechanical effects, I care even less. For me, it is a kind of alliegiance indicator. Chaotic Evil is "let's destroy the world, we like primordials" camp, Evil is "let's work against society", neutral is most of "let's live our lives", Good is "Society is more important than me", lawful good is "Society is more important than you".
There is quite big difference between G and LG in my eyes - LG will sacrifice everything to keep order/balance/world in shape, fight destruction coming from primordials, etc. Think inquisition mixed with Mechanus, while officially coloring themselves as 'good'. G is less defined, it is for creatures which think that gods' creation is quite important.
Still, I'm yet to find a place where it makes any gameplay difference except splitting monsters into 'mad destruction' and 'smart corruption'.
In 4th edition, due to general lack of detection methods/mechanical effects, I care even less. For me, it is a kind of alliegiance indicator. Chaotic Evil is "let's destroy the world, we like primordials" camp, Evil is "let's work against society", neutral is most of "let's live our lives", Good is "Society is more important than me", lawful good is "Society is more important than you".
There is quite big difference between G and LG in my eyes - LG will sacrifice everything to keep order/balance/world in shape, fight destruction coming from primordials, etc. Think inquisition mixed with Mechanus, while officially coloring themselves as 'good'. G is less defined, it is for creatures which think that gods' creation is quite important.
Still, I'm yet to find a place where it makes any gameplay difference except splitting monsters into 'mad destruction' and 'smart corruption'.