I don't actually own any original G1 comics but I have seen/read various issues in bits and pieces. All I will say is that overall, I really don't like them. I don't like many of the characterizations nor the story lines.
The only reason I'd actually buy them is for their value as collectibles, some of the 'pictures'... and because I'm a completist.
It's hard to recommend any story or issue in particular because you never know what people may like/not like, which may be different to what you like/do not like.
How do they compare gainst the current era of comics? They don't, really. But considering the era that they are from, that's to be expected.