I honestly felt that this was the best written out of the four guilds, don't get me wrong the others were great, if a little rushed. But to be honest I felt that I was due the role of leader the most for the theives guild.
I wasn't just given the role from the last leader
Nor did I get it because the night mother chose me
Or because I was the other person in the room when Tolfdir decided
I had to work for a long time, through the quest line, and doing tons of side quests. as well as that the guild and the flaggon look so awesome when you have done all the side quests, you can really see the input that you have had on the guild
the thieves guild is the only faction that improved after the questline. the DB = majority died, college = 3 died, companion= 2 died
Thieves guild, only one person died(mercer) and he deserved it. Plus after the guild master quest, you get all 5 holds under thieves guild control, about 2 more new thieves guild member(etiennes if u save him in thalmor, and that elf guy) and 4 merchants in the flagon. So i say thieves guild is a success, but its too rushed.
Only thing i HATED about after the guildmaster quest is, dirge keeps on saying i am the GM's fren blahblah. And that bar man...
i might throw both of them into the water and see if they recognise me