not everyone gets paranoid and anxious. for me I actually use it to control my anxiety. have never had a hallucination on weed. wish it did tho thatd be awesome. and depends on the strain if I get less motivated or not, some light a fire under my ass and I cant sit down.. there is never a one size fits all cap and it hold especially true with marijuana
and as far as stupidity. since i was young, years before I took my first toke. I was told many times I was the most stupid person with a 153 IQ they have ever met. the last time I tested was in 08 and i got a 151. so in fact after 15 years of daily consumption I really did lose some intelligence.
but it was worth it. and i have a sneaking suspicion that some of the HARD drugs I partook in had more to do with the drop in IQ than anything else. I havent done acid in about 12 years but on occasion I will still get a drip trip. that wonderful euphoric split second that makes you go wtf just happened oh yeah acid 12 yrs ago happened. then for the next minute your trying to figure out what the hell you were doing before you got side tracked.