Before I was buying per issue, but with the more modern stories (TF wise) I find that I can surely get a trade in the end which ends up more cheaper, and you dont get to miss out on the story coz its already all in there. So for the current TFs wise comics - its TRADES for me. As well some non TF comics I tend to collect (especially Fables- seriously this storyline is wicked, hooked the first time I read Trade #1!!) I prefer to have it in TPB coz I dont wanna wait how the story will end I just want to read it fully on. BUT, I do still have some comics that I get per issue - JLA, Shadowpact ( although now ended) and some short ones like the current limited Reign in Hell series by DC, yep me loves mystical/mythological type stories hehehe.