But I love spicy food...
I eat hot peppers with everything.
Which, sad to say, is likely a big part of your problem. Spicy foods are very intense flavours, and your body builds up an immunity of sorts. If you're used to eating very rich and/or spicy foods, everything else will taste bland and washed out in comparison.
The vape should taste like the juice. if you put a small dab (like half a drop) on your tongue, and you can't taste it, don't expect to taste it when you vape. I've found very few juices that actually increase their flavour profile when vaporized. in most cases the flavour will be slightly less depending on what atty/carto/tank system you are using.
For the iClear 30's. These are pretty decent tanks, but I personally find that top-coil cartos with long wicks tend to mute flavour as they don't wick the flavouring as well as the actual PG/Nic. I prefer bottom coils for this reason as they tend to be more consistent in flavour from start to finish.
I've found dripping is ALWAYS the best way to test a juice simply because there's so much less to go wrong. Proper wicking, airflow, etc are all almost a non-issue, but dripping is a serious PITA to do all the time.
Also, as others have posted, it's very important to keep drinking lots of fluids. E-liquid dehydrates your mouth and flavour intensity will seriously drop if you're not getting enough fluids. Chain vaping will also cause a decrease in flavour simply because your body becomes used to the flavour over time. Put the PV down for an hour and come back to it and it will be more intense as a result.