Hey Tiaros, and welcome back to WoW for both of you!
D’vali might just be what you are seeking as our average age is in the upper 30s, lower 40s, and while we like to get things done, we do not put hardcore pressure on people and focus on having fun as a group. We are not a new guild and have been established in WoW since the original beta.
I am going to throw a link to our recruitment thread here for you to browse through and you are welcome to contact me with any questions or just to have a chat.