I never did figure out how the Hardy Boys were allowed to travel to so many exotic places and have so many adventures, but I didn't care. I read every single volume of the most popular boys' and children's series. I pretty much cleaned the library out of most mystery series, including Encyclopedia Brown, The Three Investigators, Famous Five, Secret Seven, Bobbsey Twins, Boxcar Children....
Having a web site on children's series books has introduced me to other series such as Brains Benton and Happy Hollisters.
Not all boys' series were mysteries though. The Stratemeyer Syndicate produced more career and school stories than mysteries. (Tom Swift, etc.) Danny Dunn was another of my favorites--even though I didn't pursue a science-oriented career.
Sigmund Brouwer is a current author that writes fast-paced series for boys on topics such as hockey, extreme sports, mysteries, Arthurian legends, computers etc.
I finally broke down and read a Harry Potter book the week I was home from the hospital after having my second child. (He slept all the timeon my chest.) In fact, I read all four books that week. (My toddler was so mad at me she wouldn't have anything to do with me, so I had more time then than I ever would again :)
If you are interested in one or several of these series, I have started a reference shelf of information in print.
Many people have written me to ask where they can find out-of-print books. To help them and others, I have created a dealers page. Good luck in finding that last book for your collection!
My Christmas list is growing to include other holidays. I have included books and chapters in books in which series books take place over holidays in my Holidays, Series Book Style page. Check it out and help it grow!