thanks for the comments!
i'm wondering if the fact that a couple of them are smelly gives any clue to the type or potential quality of the strain. the weed that the seeds came from wasn't an amazing smoke, but not bad, and i am wondering if i give it more tlc than the original grower, give it enough time, nutes, keep it sensimilla style, and take care with the curing process, it'll be a bit more potent. it would seem that the genetics of a seed set your limits, but it also seems that there quite of a range of quality you can get- from good to bad- within the genetics based on how good your gardening skills are... am i on track here?
it's definitely warm in the grow room, like around 85 deg F (has co2), and nothing but a fan for cooling, so i don't think cool air is the culprit on the stems that are purple, brown, or whatever color it is lol.
this is just some bag seed from a couple diff bags... i noticed a couple of the plants (not pictured) have a little diff shape to the leaves, and have stems that are more white-ish (and they don't smell)