Onramps are my favorite. WOT till I get to merge speed... if I can resist going faster. I often manage to drive within five or ten miles of the speed limit everywhere else, but on ramps? You're SUPPOSED to get up to speed!
Even better, those stupid ass onramps where you have a stop sign right before the merge point. WTF used to be my response to that, now I have to wait for a HUGE opening to merge in because of how long it takes to get to speed. 230hp in a light little Sonic, that opening can be much smaller, because I'm willing to burn a little rubber and a lot of ethanol to get into the slot.
Can't say as I have the braking issue the OP has though, I only need to get up to fast enough, not so fast I need to brake to avoid the guy ahead of me. Well, no, there was that one time I went to 125 and the taillights ahead came at me pretty fast, I did brake a bit there.