I never spend too much time doing things like planting berries or going to the Battle Frontier or playing Contests or anything like that, because I'm so busy and a little obsessed with getting my favorite pokemon to level 100 (WITHOUT CHEATING) so yeah, I think all the hundred-thousand side quests can be a little much.
But they're also really fun when I get tired of training and need a break. So I certainly do like them. ^^