Because this.

Having just a few interesting quirks specified pretty much immediately translates into memorability. Consider one of our more Nortorious members. Most people's conlangs, when put into one sentence, would return something like "It has 25 consonants, ten vowels, is SVO and isolating." With this person, it is "it fucking inflects nouns for the TAM of the dominating verb @#!%!". The same goes for any good conlanger.

Amqoli inflects nouns for the aspect of the dominating verb:

Bgul tham tuqari.
man soup 3SM.TOP-eat
The man is eating soup.

Ebgil tham tuqari.
IPFV-man soup 3SM.TOP-eat
The man eats soup.

Duhai does something similar — verb tense markers take the place of case markers: (note that 'tense' doesn't exist in Duhai in the sense that it exists in English, but there are still temporal markers that can be called tense — more on this later, once I find the paper where I got the idea)

Da2 ha2 go4i6 ke3fat4.
1SG ABS barbarian punch.S.TEL
I punched the barbarian.

Da2 se6 go4i6 ke3fat4 ni3 dy6 si2tv4.
1SG PST.OBJ barbarian punch SR 3SG fall.S.TEL
After I punched the barbarian, he fell down.

Da2 go4i6 ge3 ke3fat4 ha2 dy6 si6tv4.
1SG barbarian GEN punch OBJ 3SG CAUS~fall.S.TEL
I punched the barbarian to the ground.

Da2 go4i6 ge3 ke3fat4 se6 dy6 si6tv4 ni3 da2 syt2tv2.
1SG barbarian GEN punch PST.OBJ 3SG fall.S.TEL SR 1SG walk_to_shore.D.TEL
I punched the barbarian to the ground and then started walking toward the shore.

(Duhai has accusative-aligned switch reference, but ergative-like case-like-thing marking: Da2 se6 syt2tv2. (Before X,) I started walking toward the shore. Ha2 doesn't show up in intransitive clauses, however.)

I'm not sure if this is interesting enough to merit a post on this thread, but one thing I was planning to do with what will probably be called Maotic is a unique way of marking inflection on noun phrases: when a noun is modified by an adjective (or noun in what would normally be a genitive), said adjective is inflected for the case of the noun, but the case of the noun is a constant case which I don't have a name for (if anyone does know, please tell me.) Examples:

Há1SG.NOM soktakill-PFV-1SG clavei.king-ACC
I killed the king.

Há1SG.NOM soktakill-PFV-1SG luseitall-ACC clávon.king-ADJ
I killed the tall king.

Há1SG.NOM soktakill-PFV-1SG KueleiKuel-ACC clávon.king-ADJ
I killed the king of Kuel.

Something I am considering doing, as a sort of complement to this, is having a phrase with matching case be essentially a compound word. Which should be better expressed as the converse, but anyway.

Yes, this is interesting :-) More explicit case markings on determiners than on nouns is a feature that I know - actually, my native German is an example for that:
Sg.
Nom: der große König "the tall king"  großer König "tall king" König "king"
Gen.: des großen Königs /  großen Königs / Königs
Dat.: dem großen König /  großem König / König
Acc: den großen König /  großen König / König
Pl.:
Nom/Acc: die großen Könige /  große Könige / Könige
Gen: der großen Könige /  großer Könige / *Könige
Dat: den großen Königen /  großen Königen / Königen
*The gen. pl. without any deteminers is never used - it's always replaced by periphrastic von + Dative (von Königen)

So, you see, of the eight possible forms, the article distinguishes five, the un-determined adjective four, and the noun and the determined adjective only three. By the various combinations, German distinguishes seven of the eight forms for the constructions with article (nom and acc pl. are never distinguished). But that's still not what you have - the noun still distinguishes cases when determined, and the fact of determination doesn't change the number of cases distinguished on the noun, but it changes the number of cases distinguished on the adjective. So your lang looks like a combination of a more radical German system with inflected genitives (which exist in some natlangs) and head marking... I like it.

Modern Quazian has a ten-vowel system split into front (/i e æ y ø/) and back (/ɯ ɤ ɑ u o/) vowels. A single word can switch vowel classes as part of its inflectional routine, like so:

ŋakka "word (nom.)"
ŋäkkää "word (acc.)"

where Classical Quazian had ŋak'a and ŋak'a ja; later the accusative clitic ja merged with the preceding word and the -j- deleted, turning the preceding vowel into a front vowel. Since the penult was stressed, this affected the entire word. Similarly:

väʻi "hand (nom.)"
vaʻuu "hand (instr.)"

The Classical Quazian instrumental clitic hu became a case-ending; when -h- dropped out after a penultimate vowel, it backened the entire word, if front.

The default meaning of using a dimension word (e.g. width, height, size, weight) as an adjective in Lilitika results in a minimal form, e.g. evegzí (small) from evegze (size). To create a "large" word, the generic prefix kel- ("great") must be added on (i.e. kelevegzí), and for "medium," a negation is performed with al(e|é|ez)-, (i.e. alvegzí). This originates in a cultural background that encouraged and normalized modesty.