[@HeySeuss] Not sure why you mentioned me? My own interest check is a list of plot options and pairs with rules...

I enforce a zero-tolerance policy of "no one liners" in my 1x1's. Unless I am literally RPing in a chat room where there is no expectation for anything resembling "good" RP, there is [i]no way[/i] that one line posts can give me the character depth and world-building that I expect in my RPs. This is why I only hunt for games to join in the Advanced section and I make my expectations very clear in my 1x1 Interest Checks. Even if the characters are engaged in dialogue or blow-by-blow combat it doesn't take much effort to describe [i]how[/i] a character says what they are saying or what their body language is doing, the sound their sword makes when it hits flesh or the feeling of horror they experience when they miss. 

I find that when I am forced to "fill in the blanks" of all the things my RP partner doesn't make an effort to describe about their own character, this leads to a type of miscommunication that ends up requiring a lot of OOC discussion and back-tracking. This spoils RP for me. Especially in my 1x1's I don't mind it at all if my partner takes a couple of days to put a decently-sized post together. My own posts average 4-6 paragraphs but I have been known to throw down 15k words for something especially epic.

When I have spent a majority of the RP being descriptive and basically building the world for my partner and I get a two line response, that's a slap in the face. It tells me that my partner is either not interested enough or just lazy, or some combination of both. If my partner has such a lack of imagination that they "don't have anything to contribute" then they aren't the kind of person I want to RP with.

Everyone gets something different out of RP. Putting your preferences in your rules or interest check is not being rude or exclusive. If anything it's doing everyone else a favour by helping them save time. If you like one-liners and you're reading an interest check that says "no one-liners", pass to the next one. It's not that difficult is it?

When it comes to group RPs I take the opposite approach to you [@HeySeuss]. If people are going to only post once per week I'd rather their posts be longer and cover more material. Speeding up a particular scene with shorter posts (for example, dialogue) only works out well if people post more frequently.