Unfortunately, I came to dislike them all out of all the groups of starters. :( However, I started with Oshawott the first time through White and while I wasn't really impressed overall, Oshawott does remain one of my favorite Pokemon. But that's more for personal reasons than anything that happened in the game, haha.
Out of all of them, I actually enjoy using Snivy the most, if I convince myself to keep my starter. While the Tepig line is easy to use and not a terrible line, by this point in the series, I was bored with the Fire/Fighting typing, so I just...didn't care about it and it felt largely outclasses by the Torchic and Chimchar lines, so...there wasn't any interest in it. Snivy is fun to use in BW2 many because I like to teach it Aqua Tail...I really enjoy working on a set around. I usually go with Leaf Blade, Coil, Aqua Tail, and Dragon Tail. Fun stuff!
But yeah, send my vote to Oshawott when it all comes down to it, though. Only Oshawott, though. Not Samurott. lol