These are all great points and questions.
Smittie, I seem to need a large bag always. Which is sad because I prefer the look of smaller ones! But it is what it is. I am often travelling (and need my computer) and when I'm not I might need an umbrella, or water, or a sweater, or to carry some shopping...happens summer as well as winter. This past summer I used an even larger tote bag and/or my backpack all the time. Only time I don't use such a big bag is if I'm going out for date night.
Summer look is quite similar -- at least my core style is similar.
Rachylou, now that is an interesting thought - a table purse hanger!I've never seen one!
Karie, I mostly hang my bag on a chair. But chairs with rounded backs are hard to hang a shorter strap from, and then in places like the theatre you can't do that. I can put in my lap of course.
Manny, that's good info, thank you. I really wonder...this summer my bookshelves kept getting covered with grit that was coming in the window...it definitely makes me think....