if you check out these peppers you can toggle the search parameters on the left
http://www.chileplants.com/search.aspx?Search=True&SearchButton=&SearchMode=simple&SpeciesCode=&Letter=&Keyword=&CategoryID=1&HeatID=2&TypeID=&UseID=&SizeID=&FleshID=&FoliageID=&OrientationID=&HeightID=&SeasonID=&DeterminancyID=&Heirloom=&Location=&Color=&Page=1&LengthID=&WidthID=&StockStatusID=&NewProduct=&ImageHeader=
stick with mild and medium and you should find what your looking for.Â
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It should be noted that they sell seeds as well as live plants.Â
 Years ago when i first started looking for peppers that were less common and not what local nurseries carried...
I ordered plants from them, and they arrived alive and healthy multiple times with incredible detail to packaging for the plants safety during shipment.
They grew true to what they were supposed to be (no mislabeled, or way off incorrect phenotype)
 That being said, their shipping is expensive, have to buy live plants in lots of 6, etc.
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This does not mean you can not still look at large groups of peppers based on various search parameters.
Heat Level
Pod Type
Uses
Color
Flesh
Length
Width
Orientation
Foliage
Height
Season
Location
Species
StockStatus
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anyway, I have found this as a decent resource for looking up various peppers that i have not yet grown and tried myself
It's not going to have the rare wilds, or the newest crazy superhot crosses, but i think its 500 peppers with information on each
a decent enough starting point for a new grower.
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I think it all comes down to personal tastes and trial and error
What grows and produces well in one climate wont necessarily do the same in another climate, also you may have different pests than me, etc.Â
 Other than trial and error of growing what you think you might like and seeing how it does for you, i don't know what to suggest.
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Also, their are soooo many peppers to choose fromÂ
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You've likely barely scratched the surface
Welcome to the insanity of wanting to try them ALLÂ