the ones closest to me, my immediate family and best friends, don't think I'm too wierd, they do get bored with the whole subject of fish, though. =)
At this stage in my life, if I met somebody and they started rolling their eyes and thinking I'm wierd because I have hobbies, the friendship wouldn't go much further then a very casual acquaintance. All the people I hang around with on a regular basis are pretty eccentric and interesting themselves. One is obsessed with photography, the other collects Freddy Krueger memorabilia, etc. They may not SHARE my interest in fish and reptiles and all things nature-ey, but they understand what it's like to have interests other then shopping, drinking, and watching TV!
Now that I'm thinking about it... the people that would think I'm wierd are almost always pretty boring.