If you tried a-PVP and got a real good feel for it, but did not like it, I would probably guess a-PHP isn't for you. Although my experience with a-PHP is limited at the moment, and some of that statement I make just based on others comments & reports. Although personally, I like MDPV, a-PVP & a-PHP. I find a-PHP the least pleasant of the 3 so far.
4-FA is fun, its pretty enactogenic though, meaning its got a big serotonin aspect to its effects. Its definitely much less tweaky, paranoia incuding and sleep depriving than MDPV. As psynce said, I wouldn't recommend putting any of those chems I mentioned up your nose.
2-FMA or 2-FA may be right up your alley, and probably won't keep you up for 3 days masturbating.
I would read around the forums a bit more, do some searches in the forum search box as well. There is a large wealth of information here, just gotta actually take the time to find it. Plus you will probably learn a lot of harm reduction tips along the way for any chem you are interested in.