I have never tried that "dab" thing... but smoked hash on and off from I was 13-14 until I was 19. And from 17-19 I was smoking it pretty much daily! And when I say smoke... I mean SMOOOOOOKE xD
That shit aint good for ya.
Here is how it has effected me:
Lost short term memory: I could not remember things past 1 day, meaning I would not be able to remember what I did the day before yesterday. Thinking back now, I remember people telling me X thing would happen (lets say - X person said that he is expecting a call from Y person to invite us to a party.... 10min. later the person would ring ... and I would have no idea what just happened and people would just leave me high on the sofa. (we were best friends but amongst all of the smoking we all lost our ways).). I could not read a book, because after I had read 1 page I would have forgotten what I just read and I would have to go back and re-read it LOL.
Confidence: I used to think very highly of myself, and you could not do shit do put a dent in my confidence... I could walk up to any girl and within 1-2min. have her number (or make out if I wanted to).
Became a recluse: I started becoming dependent on that stuff on a day to day basis, and if I did not smoke, I would hear voices and feel like people were talking about me (even if they were not speaking - I could hear their thoughts). I lost my socializing skills, I used to be the life of the party (any where) .... now I am somewhere in the background. Even to this day... I find it hard to meet people so I just work away on my business. I will do something about this tho. Things like that have really put me back, because to even work in an office you need to be able to get on with people... totally lost that part of me.
Health: I could not walk up a flight of stairs without being out of breath (and I mean like a person that has been running for like 30+ min.). I have great stamina now though

I run every Sat/Sunday for 1-2 hours. I lost soo much weight.... (always been what you call skinny/athlete type - but smoking just took its toll on my heart/lungs).
Just the whole quality of life has gone down immensely. I believe I am behind about 5 years in my life (i.e if I had not smoked that shit, I would have been a very successful business man by now, maybe even with a family - who knows).
And probably a whole lot of other shit I have forgotten/not mentioned!
In short.... Drugs are bad, mmmmkay!
I am not here to judge, go do you. Just giving you my own personal life experience with hash/concentrated weed.
Not touched drugs/cigarettes for 6+ years now and I'm in the best shape I have ever been in my life (stamina wise), I have a great memory and have become a real autodidacte. I am still dealing with my angst/social phobia and plan on meeting up with other people with angst via meet.com and get comfortable doing the things I used to take for granted at 1 time (making friends/meeting chicks/etc.)!
TMI I know I know