Wow! I thought I was the only one with ADD when it comes to many things. Like you, I tend to collect things and some things I never find my way back to, while others I have trouble staying away from (things that tend to absorb most of my time when I know I should be doing something more productive; e.g., using the computer instead of stuff like... paying the bills, etc.). Hadn't ever really summed it up as you have, so this puts a unique perspective on how I see things. I always thought I was just a major procrastinator with gathering so much, but I read somewhere, sometime that I was just a "collector." Too many hobbies w/o enough time in the day; there is so much I'd like to do, I just never get around to it or get caught up in something else. I guess where we really differ, in regards to this, is how we unwind at the end of the day. I usually tend to drop into a book for anywhere from 15 minutes to a couple of hours (depends on how good the book is, not what time I have to get up), though I guess you unwind by surfing the Internet (this would just get me into trouble with my better half
). I think what's neat about eBooks is that if a book loses my attention, I can mark my place, switch genres or even style; i.e., manga vs. regular, and come back later if I so choose. There for a while I had a problem with finishing books, but I started keeping track of when I started/finished, who wrote it, what it was about, and how I rated it; this helped for a while and kept me going about finishing good books and let me know just how bad some where. While it helped me quite a bit at the time, I don't do this anymore, but who knows... I may start again, if I ever get motivated to keep track again.
Good luck with finding what suits you best; after all, it's what makes you happy that matters the most in life!