I like modified, but subtle in some ways. I love it when you know something is different, but not exactly what it is until you study it for awhile. Since I'm building my truck the way I like it I'll give some examples:
I'm going to do power windows....but use a switch that uses the original window crank.
I'm hoping to be able to use a stock AM radio to control the volume, but actually use a car computer to run all of the audio/video in the truck.
In all honesty, a totaly orignal stock truck doesn't look good to me. I can definatly appreciate the hard work that goes into a resto like that, but it's not for me.
I like aftermarket wheels. They're the eye candy of any vehicle. You can take a POS rust out hunk o' junk and put nice wheels on it and it will look 100% better (that may not be a big improvement if its that bad

) I like 17" wheels on these trucks, and really like the way the TT2s on my GMC look. But you also have to have the wheels and tires in proportion to the wheel gap. It's hard to explain it, but when you see it it's right. That's why I have 275/50/17 tires on my truck rather than the much more common 275/40/17s. They just wouldn't look right on my truck with the amount of drop I have. On my 68 I'll be running some 20s with some wide tires. BUt with airbags I'll be able to set the fender gap at the proper level
On the engine, I like lots of different. One thing, it has to be clean. Whether it's a new engine (gen III), polished old school, or original style I like and apreciate all. One thing is I love the cast aluminum valve covers that say "chevrolet" on them. Good thing they make them for the GenIIIs I'll have in my 68. I've never been able to run them before cause I think its just wrong to have chevy valve covers on a GMC.
I also don't like a whole lot of trim (on these trucks) The body lines without trim does it for me. However I've seen some very nice examples with trim.