I'm not sure how many I'll do. I plan to take a look at the Superman/Booster Gold crossover and maybe Booster meeting Batman, John Stewart and others in Teen Titans. The last one barely factors into the BG series anyway. I'm unsure on Millennium because it's Millennium. When I was first collecting BG back issues I steered clear of it because it was so infamous. But I kinda feel that I need to go over it in order to explain how the series ends. It won't help in some respects--such as explaining the choice of the Manhunter--but it might be fun. I won't go over JLI because it'll take too long when I mainly want to focus on the main BG series.
Since I'm feeling nostalgic for time travel stories I plan on doing these reviews for a bit although they won't always feature Booster. Although Rip will show up in all the ones I'm thinking of even if he's not one of the main characters. I miss my time travelers.