As a top/mid main, when bot tower gets dropped.....
I love it when the team thinks about the team comp.
I found myself agreeing w/ both of the recent threads about mid lane ganking for bot, and bot rotating to mid. At first I felt like I should agree w/ one over the other since they were opposed (kinda) as threads. Then I realized it's all about team comp, and if the people make the right decision then it's awesome.
If I'm ziggs mid, w/ caitlyn & nami or sona bot, and a nunu jungle, taking the middle tower is easy and let's do it. I play more top than mid champs, so I'm not sure what the equivalent would be for mid, but if you came top to a Nasus lane at 15 minutes then you probably aren't getting the tower, and you hurt your chance to win the game later because Nasus gains strength from farming. If you have a mid who is weak early but scales to be strong late, and a short range adc like vayne, then rotating is probably going to waste time and ruin farm. It's all about respecting the team comp and what the team needs, and damn it I love it when teammates think about that. After all, who doesn't love letting a late game hyper carry free farm bot while the engage heavy support roams w/ the jungle and kills everyone, or taking inhibs at 18 minutes because you have poke and a fast push team, or you know, whatever it is that your team comp actually does well.