Methylphenidate (Ritalin) is an Inverse Agonist / just like Cocaine (triple reuptake inhibitor) SERT/DAT/NET
Ritalin IS a dopaminergic stimulant, a dopamine reuptake inhibitor, but very different from something like Bupropion (Wellbutrin) which is also a dopamine reuptake inhibitor
Ritalin released dopamine in a manner strikingly similar to Cocaine. Both are inverse agonists on par with the amphetamines, etc
Genuine Ritalin is amazingly nice…..far better than Vyvanse (d-amph)
4F-MPH although 3.33X more potent than MPH at inhibiting DAT can’t even touch MPH in pleasurable euphoria. All those Methylphenidate analogs are garbage in terms of euphoric potential
Cocaine
Methylphenidate
Phenmetrazine
Amphetamine
D-Amphetamine
Methamphetamine
….the only TRUE euphoria inducing dopaminergic psychostimulants
I think you are forgetting a lot of RCs, 3-mma, 3-mmc (for me mainly dopaminergic, with a strong hint of serotonin in higher doses), and specially 3-FA, 3-FMA and 3-FPM. And that's just thinking a bit about it.
For me 4F-MPH it's an interesting stimulant, I tend to redose on stims, recklessly, so I like to find really un-euphoric stims to get things done, this is the only one I've found (along with yohimbe bark, but that's another story). As with yohimbe bark the difficulty here it's to find the sweet spot, if I tend to use IN ROA with this one I've tend to have problems, as the sweet spot it's very difficult to find, its margin it's narrower. If I redose too much it's just jittery and you end up sleeping poorly (but you can sleep after 6 hours). I've had some low level headaches next day after redosing too much in a day, nothing too bad or worrying.
with oral ROA it's not only much smoother but it has a strange glow, that's almost euphoric, but I guess it's not really, more like ego inflation, anti-depressant effect, that seems to get you in the mood for work but it can be too bland for working if you dose too low. If you find the sweet spot it's great for work, but well, I have ADHD. Oral ROA makes it less prone to redose, and it lasts more than solid 4-5 hours for me, very smooth comedown. The nasal comedown it's more "real" and a bit harsh, if you go over 50mg or 3 redoses a day, but it's short and very manageable with the typical stuff: magnesium, kratom, scutellaria tea,... or whatever mild downer.
2-FMA... I hate it, the latest batch were poison to my body, and stupidly reinforcing, considering how weak the euphoria is (but exists). For that reason I much prefer 4F-MPH for working.