In my view, long-range comparative linguists who think that they have to make a really long list of highly tentative cognates to impress people are a dime a dozen. What seperates the wheat from the chaff is how structured and attentive to detail a theory is. A theory without a structure isn't a theory; it's nothing more than a tale heard at a local pub. Publishing drunken tales still doesn't make them theories.
So this is why I encourage people who are interested in this topic to first explore the Nostratic pronominal system because it's safe to say that if the premise of Nostratic has any truth to it, there should be an underlying pronominal system that explains the interrelationship of pronominal systems of later language groups that Nostratic is said to have begotten. We should be starting with these questions instead of putting the cart before the horse and comparing look-alike words by pure, directionless whim. Knowing how these pronominal systems are related to each other goes a long way to understanding the evolution of Nostratic and to finding more credible sound correspondences.
Now since this is all at the level of entertaining conjecture, I'll just spit out what I think, like the drunken bar patron that I am. Grab yourselves a drink too, my buddies! There is one interesting, recurring feature in Nostratic language groups that I notice: a suppletive system involving two very unrelated forms for each person. So for example, in Indo-European we have two sets of pronominal endings in use: the *mi-set (*-m, *-s, *-t) and the *h₂e-set (*-h₂e, *-th₂e, *-e). The former set was used for imperfective forms and the latter for perfective forms in most IE languages while in Anatolian it seems that verbs were inherently part of either a mi- or hi-conjugation class. We see in Uralic-Yukaghir, Chukchi-Kamchatkan and Eskimo-Aleut languages a shared theme of subjective-objective conjugation and again there are two different sets of endings that seem to be quite ancient (e.g. Hungarian 1ps -m & -k, 2ps -d & -l). Bomhard believes that Dravidian is also a Nostratic language but Dravidian uses quite different pronouns in the first and second person from the other Nostratic languages (*yān, *nīn) forcing him to reconstruct extra Nostratic pronouns just to account for them. In Afro-Asiatic languages, yet again, we apparently have two different sets (Middle Egyptian *anāka "I" > Sahidic Coptic anok versus Middle Egyptian *anāna "we" > Sahidic Coptic anon).
So I figure the best way to explain that is to propose a suppletive absolutive-ergative system for Nostratic as follows (note that my intention is to conjecture for the sake of discussion):
|1ps||*nu (> *mu)||*hu|
 See Pedersen, Zur Frage nach der Urverwandtschaft des Indoeuropäischen mit dem Ugrofinnischen, Memoires de la Société Finnoougrienne 67, pp.311-315, Helsinki. He discusses the derivation of PIE's so-called "perfective" endings from a pre-IE intransitive conjugation. Also Abraham/Kulikov (eds.), Tense-Aspect, Transitivity and Causativity (1999), pp.21-42, Amsterdam. Kulikov shows a relationship between imperfectives and transitives (and conversely between perfectives and intransitivity) using similar data from Yukaghir and Aleut.