I pretty much tinker with, add on, and sometimes pretty extensively scratch-mod about every kit I open (save for the one DML flakpanzer I I am trying manfully to keep strictly OOTB...

).
Here is a recently-completed Trumpeter E-10- there is a lot of scratch on it - the mesh schurzen and racks, the top deck has lots of mods (cupola and deck, rebuilt Tamiya IR device, scratch rundumfeuer MG mount, anti-shrapnel armour, re-done opened louver system for engine air, cleaning rod assembly and mount, wood pole antenna, etc.), and the entire rear-end is mod with scratch exhaust system, "jeep" rack (really works!

) and armour deck w/ jack over exhaust system.
I'm too cheap - so do it all with styrene and coke-can bits, etc.

PS: There are a few more pics of this project on my pics in the kit-maker photos, if you wish to see some more?