This topic could get interesting..
as for your question, the answer truely isn't a right and wrong, there are multiple different types of collectors, some collect what they simply like, some buy multiple figures of the same characters as they like the sculpt/colour and as already pointed out it could be they come with a decent army builder!
Army building gets addictive, so when you have 28 Gung-Ho's or 30 Snake Eyes.. it can look strange, but hey it's their collection isn't it, everyones collection will be different.
Then you have the completists.. who want one of every figure ever made, there are also some that are semi completist.,. in the sense they want 1 version of every character out there. So they will pass on 20+ versions of Snake Eyes and just have the v2 or v1 in their collection, considering they have this character they don't have a need to have two of him.,
I've started to favour this way of collecting, and it's partly a situation i have in my own life, not enough room, easier and much more manageable collection to work with on dio's etc..
As for the 25th Question, I got a 25th Storm Shadow in a competition I won, I done a review about the figure here @ Joe Dios, although the figure is good, it has problems. Three main gripes, which I wont go into discussion with here as I'd be beating a dead horse and repeating myself over and over.. if your a vintage collector and a new product is released (25th) the product has to be substantially better and outclass it's predecessor and honestly I don't think this is the case with the 25th.. they have just as many problems as the rah line.. so if you remember collecting gi joe and wanted to rebuy your favourites as you missed out (as in lehsreh's case) the 25th line is a good situation for him, for a vintage collector like Ender098. GIJOCK, Outrider etc.. they arent going to shell out fat $$$ on a secondary collection that has just as many problems and in their own viewpoint, inferior to their own..
We all have our opinions, I think if I was in Lehsreh's situation I would love the 25th.. and for those guys who sold their collections when they got a woman.. only to see it fall through.. they'll be all over the 25th, it's a modern mix of action figure meets nostalgia.. which as already proved is a deadly combination for hasbro.
I still have my major doubts on the success of the line, but that can be saved for another topic.