Choosing between Reissue and Original pressings


Reissues have been common since quite some time but these days as vinyl has picked up momentum again, there have been some very high quality reissues from labels like Classic, Analogue Productions, Speakers corner, MFSL, Boxstar etc. For any particular album how do you decide whether buy a good reissue or get a good copy of original pressing from ebay ?

For the sake of discussion lets keep out exceptions where the original pressing is too hard to get or too expensive. In most cases it is possible to buy a copy of original pressing for sane amount of money if one shops carefully on ebay but I have also found that quite a few times a high quality reissue can sound better. Whats the general thought among hardcore vinyl followers here ?
pani
This subject is one of those that rather turn me off from vinyl to a certain extent. Yes, I heard some original pressing that is noticeably better than more recent reissue or current audiophile reissue. However, if the music is good enough , the difference between pressing is not significant enough to deter me from enjoying the music unless the LP is defective or have way too much surface noise. If I find an album that I like enough on reissue, eventually I might try to locate original album if I think the music is good enough for the premium price asking on some original pressings. My rule of thumb, if it is an album that I really like and I only have one copy, it will eventually fall off my hand one day and get scratched badly. If I have more than one copy, none of the copies will ever get damaged! :)
Stockfisch is the other label that I really like their new LPs as far as sound quality is concerned.
For country of pressing, if the band is a UK band and is first released in the UK before the US, then I'll try to get UK and vice versa. Generally I don't like Japanese pressing very much as they almost always remastered the album first and the typical EQ for Japanese record is usually not to my liking when comparing to the original western counterpart. But that's just me though and I have to confess that my sample size of Japanese pressing is limited but that's what I found so far.
I agree with Viridian about 40 to 50 year old tape loss,music I listen to.I stopped buying reissues years ago.There are so few exceptions it's not worth wasting the money to find out for me anymore.I got tired of wasting 25-30 bucks for an LP and after 2 minutes of play it comes off the TT never to be played again,original better.The tape loss on Zappa's Hot Rats classic reissue is unbearable for me to listen to.Reissued vinyl of 45 year old recordings is just not happening for me or worth the gamble to buy.
Playpen
There are so few exceptions it's not worth wasting the money to find out for me anymore.I got tired of wasting 25-30 bucks for an LP and after 2 minutes of play it comes off the TT never to be played again...

Yes. That's it in 2 sentences.
Patience is also a vinyl virtue. I've come across 'Reckoning' G. Dead & 'Friday Night in San Francisco' DiMeola, McLaughlin, DeLuca for less than $10 total by accident. These currently sell new as reissues for almost $100. 'Must Have' is a relative term.
Playpen,
Well stated, I came to that realization several years ago.There certainly is good sound to be found in records but the 'hit and miss' factor is frustratingly high.
Many vinyl records are really just mediocre and not worth the chase and expense.For many years I was a strong vinyl advocate.
Regards,