I love the announcer too, actually. It's honestly part of why I like the game. The announcer makes the game feel more... gamey, if that makes sense.
I wouldn't be surprised if MK8 is more annoying than older Mario Kart games, because 1) you can't drag an item behind you while having a 2nd item in reserve, and 2) there are coins as items for some odd reason... However, I haven't played MK8 yet, so my comparison to Sonic is with older MK games.
I think I find Sonic's items more annoying than Mario Kart's because they're much poorer at defense. You can't defend yourself by dragging an item behind you, which allows you to get hit more. Plus, most of the items that attack you move so fast that you have little time to send an item out behind you for defense. The only way I can be almost immune to items when playing Sonic is by moving far ahead in first place. Otherwise, I could be hit by an item, potentially leading me to get hit by other items that would send me back. (Plus, since the items aren't as powerful, getting back to first isn't exactly easy...)
I don't mind too much that Sonic's items feel more useless for attacking. (That's actually not entirely true, considering the fast items like the sniper snowballs, lol). However, I really dislike that they are more useless for defense.