Mmmm...Opiates...
Prescription drugs, opiates in particular, are my life.
I can honestly say that if you like Vicoden, then you will like <or love> the stronger opiates.
Starting with Codeine <Tylenol 3 for example> all the way up to Oxycodone and MS Contin: These opiates have generally the same effect. There are slight differences as far as strength, duration, onset, method of ingestion euphoria, and side effects. However, they are generally the same.
Keep in mind, though, that when you get to..oh somewhere around Oral Liquid Morphine and above, you're in a whole new world of enjoyment.
The effects are similar, but VASTLY different at the same time.
For example, today for breakfast I had Fruit Loops and 60mg of Oxycontin, nasal.
That took care of me for the majority of the day.
After work I came home, poured me a nice plastic cup full of Oramorph Blue Label Morphine.
I am STILL feeling the same general pain relieving properties that the Oxycontin delivered...but I'm in a WHOLE NEW world of euphoria...complete with slight visual distortions and a relaxation all it's own.
I know I just rambled a lot of useless jargon, but I'm obsessed with all things opiate.
Plus I wanted to brag about my liquid morphine.
In any case, experiment, be safe, and enjoy.