There is no art to oil (don't start, just don't). Look at wine or beer. Interesting, flavorful, artistic, entertaining. Look at cigars, varied in taste and body and scent
As we refine such things, the art dissapears. Change from cigars to cigarettes and you have essentially a crude nicotine delivery device. They stink, there is no genuine enjoyment, just nicotine. Brandy is distilled wine, not as interesting, but far stronger. Beyond that, we get to ethanol. Why would you drink straight ethanol? For a buzz. Not in order to appreciate your hard effort or the strain or your care.
But you said you don't have space.
We're I you then I would seek to preserve all of the taste and scent qualities of your effort.
Oil doesn't do that.. Not really. And oil is more volatile, prone to chemical degredation.
My favorite concentrate is old style hashish. Sifted or collected. , a nice grade of non green, compressed and well preserved Moroccan style hash, golden, fragrant, powerful yet smooth is my all time favorite if I am smoking at all.
I believe it is under valued and under appreciated.
One of my pet peeves is the adolescent sort of "candy" flavors and aroma. It's all sweet. Fruits, cookies, lemon, grape, kiddy flavors, like a roll of lifesavers.
I'm a scotch drinker, a fine cigar smoker, I like a steak now and again, I like good wine and smoked fish and red pasta sauce. All savory, "adult" flavors. (I do have a sweet tooth so I'm not condemning cookies and pie and ice cream and such)
For some reason, such traditional hash has fragrances and tastes of incense, exotic spices...the taste of mystery, of adventure, savory, peppery, wonderful.
Bubble hash just doesn't have the same quality. The water seems to wash something special away.
Well. Anyway, that's what I do with my extra and people love it when I click down a little brick of quality hash. (You can tell how good the hash is by the sound.. The good stuff seems to "click")