First things first, there's not thing such as "one genre of quests is better/worse than the other, just because".

Secondly, I personally think that writing can be as much an effort as drawing. High-qualitiy writing involves as much concepting, redoing, correcting and so on as making a good picture.

Writing, on the one hand, has the benefit of updating really fast and reacting to suggestions well. Somebody who likes writing (and I assume such a person would run a textquest) will surely have no problem to give short responses almost as fast as the readers are F5ing, while taking of course a bit time to give a longer, high-quality response.

The benefit of a picture is obvious: Its beauty is revealed the instant it appears in front of one's eyes.

With writing, it takes more time to appreciate it. One has to go through all the little letters before the "beauty" is forming inside one's head.

So, if I personally had to choose between a nice picture and good writing, my first reaction would lean towards the pic, although it could later be revealed that the writing was really excellent and would have given me just as much enjoyment. But I'm talking about the very first reaction.

Also, I have to admit, that a textquest which contains a lot of details and information can be hard to get into, while a picture allows assessing a situation more quickly. It's easier to hop onto the quest while it's already running.

On the other hand, a dedicated readership, taking notes and gorging themselves on described details, will maybe have more fun and immersion than a quest whose participants are just "dropping in".

As a suggestor myself, I have the impresion that there are many likable quests on /quests/, much more than I could possibly take a serious interst in, thus I just pick a few and I am fully guilty of these quests not being textquests...

>Oh look, another guy who can't draw worth shit
Is that really such a turn-off? In my oppinion, if the quest has that "certain something" which keeps me intereted, I don't care about quality of art (as long as is is able to convey what it wants to).

If you are going to do a text-only quest, be sure that you can actually pull it off. With picture quests, much of the information is a lot easier to convey with nothing but, well, showing the thing. Reading requires a lot more time and, pardon me, effort. So if you go too verbose, many people can simply think "tl;dr" and move on. On the other hand, if you can't describe it well and in an intresting way, to say nothing of getting the message across, people won't like it since it's either dull or they can't get a good picture of it.

In short, you should know how to write. This is so very simple it sounds laughable, but seriously gauge if you are up to it. You don't need to be a master wordsmith, but at least know how to describe things efficiently and so that people will be intrested.
Also, even MSpaint sribbles can help to convey things if something really needs it.