[Boatanchors] capacitor stocks

[eugene at hertzmail.com]

Hello all,

As I learn more and more (from this group) and my projects become more involved I decided it is time to stock up on some capacitors to avoid shipping costs and delays on onsies twosies.  I have previously purchased a nice stock of axial and radial electrolytics, as well as a nice kit of ceramic discs so I think I am good here. But now I want to stock up on "others."  I should mention the kind of projects I am getting involved in. Please note I am not an audiophile. My playing is mostly HF related stuff, receivers, transmitters, shack accessories and someday I might venture into playing in VHF/UHF. But general stuff, not high-precision stuff, for general use.

I was directed to justradios.com as having some very good capacitor kits.  
http://www.justradios.com/capkits.html 
They sell 5 basic types of caps. 

1. Leaded Film (polystyrene, polyester)
2. Orange dips (drops)
3. lytics (aluminum)
4. Mica
5. Mylar


Question is, other than electrolytics, which I understand the importance of polarization, wv and capcitance value...
If a circuit calls for a value and voltage rating (and temp?) does it matter which kind, film, orange, mica, or mylar I use? 

I do recognize that the physical form and how the leads are arranged of the capacitor are useful in deciding which to put in.

Now someday, I might become sophisticated enough, and want higher precision results that might make it important for me to better understand the differences in these types of caps, how much do I need to know today when recapping some HF equipment or related shack accessories?

One of the motivations for this question is I want to buy stuff from justradios, but I don't want to buy every kind of cap they have ($$$$) So what should I get? Some axial Lead films and orange drops? Micas - I hear micas very rarely go bad. So why buy a bunch? Would Mylar be better, as it seems they are cheaper?  Can I use a ceramic disc if a mica is called for? 

If you were starting out and wanted to buy the fewest styles of caps, which would you buy?

Thoughts? Opinions? Recommendations? Warnings?
Thanks
Eugene, W2HX