There are plenty of fun guild out there. The problem is trying to find one due to the fact that there are so many. Most are for the most part inactive, or, as you mentioned, full of botters. But there are still a few. As yo uare playing in you encounter players that seem to be having a good time, friendly, etc, ask them about their guild and if they are recruiting. I know most guilds are always recruiting, but don't want to try to recruit someone out of their current guild, so they wait to be approached.
Anyways, don't lose hope.
I'm GM of my guild, and I can tell you that yes, most of the members spend a majority of their time grinding, but this is by their choice. A few do nothing but thieve all day and have gone from level 29-34 in a month because they like to have fun, which is what the game is all about. Some choose to grind and level up in the hopes that being a higher level will make the game more fun.
Anyways, can't pass up an oppurtunity to plug my own guild...shameless, I know.
Recruiting Thread Link:
http://www.silkroadforums.com/viewtopic.php?t=9674