definitely columbian gold! was still going strong until the mid 80s anyhow right up to the indoor crash. all it took for me to laugh my ass off on that shit (totally spoiled me for getting high only & my 1st smoke) was for a co-worker to see my tired red eyes at an after work party and ask if i was stoned to make me laugh my ass off. it had great visuals and a cool floaty body effect along with it's euphoria that could also go to paranoia in tense situations or serious nausea if abused in a bong.
i haven't smoked anything that fun and trippy until jack's cleaner 2 recently. oh man that was some fun shit! it had IMAGINARY visuals with a playful touchy feely buzz not unlike short stuff's (i think) onyx diesel (can't stand the abomination to mother earth flavor though) buzz that rocked but trippier. i imagined tie dye like ripples of color wherever i massaged myself on JC2. realizing how old school that effect was made me laugh good. i think CH9's jack had some serious euphoria going on too. it kind of got lost in the shuffle with a bunch of other strains, but i plan to try it again next year along with jack 33 which is advertised as euphoric.
apollo 11 strains (& A13s too?) should have some euphoria as well as his mother cinderella 99 & other crosses made from her like jillybean which has a very stony euphoria. the romulan in it should add euphoria too. apollo's buzz is more psychoactive and mellow than C99s which leans towards clearheaded and motivational. TGA's A13 vortex ought to be as happy as claimed.
kali mist has to easily be in a euphoria top 5 showdown as it's happy buzz is almost shroomlike. very energetic and clearheaded, but not what you ever want to be sitting down on. nowadays, it has a milder fruity & spicy taste where it used to taste exactly like smoking crushed red pepper, but the buzz is still the same. it takes 17 weeks to finish, so it should offer something nice. it's too racy for 24/7 smoking as is C99. it's best for activities only. then, you'll get whatever done and grinning & humming.
high quality seeds' haze x skunk has a nice motivational & euphoric buzz that's not as trippy as columbian gold maybe, but super potent & long lasting too. it's like AK-47 to columbian gold. it has a little bit of lead eye stone, but nowhere near as much stone as some, if not all, skunk #1s. it has a much better balance than kali for any activity or relaxation as well as more psychoactivity. it builds up in your system after just a month of wake & bake leaving a nice mild perma buzz that doesn't turn pure stone like even columbian would do after a month of the same. it and jacks cleaner 2 are my favorite highs for now after gold. the float effect is fun, but JC2's effects need further testing.
mandala's gone until next year 8 miles high is a super NICE euphoric strain with a totally neutral energy profile and just a happy playful buzz that wants to do whatever you want as long as it's fun with nice precise body control. it wasn't the most potent bud i ever smoked, but far from shabby either, but it just had a totally agreeable personality i loved. it's perfect lo stress 24/7 happy pill. i quit toking after just a couple hits because that wasn't as fun as tunes & dancing. everything about the THC profile is just right in a nice low key high. NOTHING i smoked that had a name made me that happy since the 80s. it's a nostalgia strain for me now, but very nice for what it is. it's what i'd imagine a real maui wowie high to be like, just tropical mellow fun.
there are a bunch of great fruity jack & "haze" strains out there that all have similar clearheaded with a little psychoactivity euphoric buzzes. the standouts that i've tried were DNA's fruity haze which is just what it claims with nice fast flowering & dense resin production. it outshone up to a dozen fruity rivals i tested. perhaps only CH9's jacks were up to it's level. john sinclair's sativa trans love had a more common haze buzz shared by many jacks & hazes, but it flowers like crazy as soon as it flips with nice sized buds lacking nothing in bag appeal in just a month where it's slower rivals are just starting to bud. that's the best cash cropping haze i've tried yet. the buzz is nicer than C99 too if not apollo 11 which i'm keen to test.
skunk #1 has a nice euphoric buzz, but gets stony quick and eventually becomes nothing but stony. it along with blueberry & bubblegum are classic stony euphoric strains.
until i try something better, jack's cleaner 2 is the funniest shit i've smoked other than columbian gold. (let me get back to ya on MALAWI gold) it had a nice warm euphoric effect for sure with some stone, but not couchlocking level. after that, haze skunk is more of a heavy hitting motivational strain that's not going to be embarrassed by anything on most streets and 8 miles high is just fine anytime to me. people prone to paranoia might not be so happy after 4 chambers worth of haze skunk and a spinning room, but if you respect it's limits, you'll be fine.
some strains to read reports on i've seen a lot of happy campers smoking are sannie's & sensi seeds' jack herer as well as sannie's killing fields & TGA's jack the ripper. on the IBL front, one grower here swears by ace seeds' panama red too.