Re: gibson 70s or 90s?
Ignore everyone who gives you ANY answer based on the freaking DECADE!!!!! They are ignorant idiots.
AT the end of the day, there are ONLY two things that matter; How it FEELS and how it Sounds. If it feels good and sounds good, IT IS GOOD!
And the sound can be changed to a great degree. You may care about looks - fine.Then pick a pretty one and don't worry about the rest.
We can sit here and dicker about this decade or that decade, or this period or that period. The bottom line is that most Les Pauls are constructed like brick $h!thouses almost always. General principles may have varied over one period or another; neck profile, wood, chambering, blah blah, blah. The bottom line is that a large number of your favorite guitar tones were recorded with some Les Paul or another. 50's, 60's, 70's, 80's, 90's 00's.
The basic tonality and feel is pretty similar no matter when or where it came from, as much as particular prickly people may say it does. Blindfolded you'd never guess any of them was anything except a Les Paul.
Also - any two could vary wildly in tone even if made one right after the other. You have to play it to know if it is too bright, too muddy, too heavy, too thick-necked or whatever for you. If you are not sure of these things you are trying to buy a Les Paul based on your fantasy of what one is or has been said to be.
I LIKE the 70's LP'S. THE REAL QUESTION IS WHY! I like them because they have 3 piece glued maple necks, and heavy as a dump truck. You may feel differently if you actually play one. GENERALLY the 3 piece maple neck is one super strong moro, and brightens up the guitar considerably (but not always). As for the weight, I'm not a sissy boy malnutrition chain smoking emo tragedy. I'm 6' 2" of strapping woodsman and martial artist. I can play that thing for 3 hours hours at ~11lbs and not even notice.
Yes - I agree - Norlin made some seriously meh guitars and did some crazy stuff. But Gibson can do that ANY day of the week (Robot anyone?). Yeah - they had a really nice run in the 90's where things looked pretty good, and when the BB1,2, and 3 pickups showed up - that was a good time too.
At the end of the day, you need to go play it. Any comment of a decade is meaningless except for some general construction principles. Any comment of a period of time is the same. ANY Les Paul could be stupidly mediocre for the cost, used or new. ANY could be grossly over priced because of internet blues lawyers who can't play Mary Had a Little Lamb. ANY could be the ONE for you, or not.
It is about THAT guitar - and not any time period. Going on time period is a serious fail, as is commenting at only the most general levels.