As a lvl 33 player you may have much to offer a guild.
I would, however ask you to consider making your own
guild. Some of the pros of being a Guildmaster are:
You make the rules. No one can put their made up rules on your game play. As you can see from other posts, many guilds impose rules with are unique to their guild, unevenly enforced and may hamper your fun. You do pay for this game and you should be able to play it any way you see fit.
You pick your own friends. Since you add members to your guild you are not stuck with players who you do not see eye to eye with. The larger the guild the more chance you will encounter players you just don't like. In your own guild that seldom happens and is easily remedied.
You make your guild to suit you. Since you are the first member of your guild you can choose how it runs, the number of players in the guild and what they do as a group. Remember, you pay for this game so make it as fun for you as you want. If your guildmates enjoy what you are doing they will stay.
Unlike the way you were treated by the other guild, when players ask you what your guild is and does you should take your time and tell them and perhaps they will have similar interests and join you! I do believe that there is one rule that everyone should follow regardless of guild affiliation or none, do nothing to interfere with the game play/enjoyment of other players. That might be a great motto to build a guild from.
Good luck in whatever you choose!