I'm curious, how did YOU case your collection? I started not too long ago and your experiences are probably better than mine

Questions that can help the discussion:
Which country do you live in?
Which case did you buy? From which provider and for what purpose? Was the shipping expansive?
Did your manuals fit, or did you have to mod your case? What about the end-product quality?
Any other personal thoughts?
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I live in Canada so I pay an extra 25$ or so for shipping cross borders from media shelving. 69$ for 100 cases doubles after all the expenses but if I think about it, it's not that bad paying ~1.25$ a case.
I was thinking on casing my NES, SNES, N64 and Sega(when I get to those) in those UGC. I think I have to mod it so that manuals can fit in the case... even though there's no manual clips to hold them in place. I'll have to deal with them being lose in the case. I haven't received them yet either so I can't share my experiences yet. I'll be getting a multi tool to zip through the plastic too for those NES games and manuals.

For GB / GBA games will be have to be reproduction DS cases with GBA slots ... I still haven't decided from where to buy. Many have said the quality sucks so I'm a little bummed and scared to start casing these games. Again, the multi tool to aid GBA games to fit in the case.
For PS1 games ... many of the ones I buy come in cheap factory cases that fall apart. For that reason, I'll be getting polly cases to uniform my collection. I still haven't decided from where to buy and how it'll go down.
PS2 and current gen cases are simple.. there's reproduction cases everywhere at a reasonable price.
I'll update this post with links, pictures and personal experiences as I case my collection.