I'm not a day one person--when the game was announced and all the hype was building, I was in a bad place financially and just couldn't think about an MMO. Once I was situated financially, I was sucked up by the Mass Effect franchise. Had a friend who was in the beta for SWTOR tell me I had to play--but I was too excited looking forward and replaying in preparation for ME3. Once that came out and the ending broke my heart, we decided to give SWTOR a chance. So... I subscribed in April of 2012, making me under a month short of getting the founder title...
And I've been addicted ever since. Still subbing a year later--as is my husband--and we specifically bought better computers just to enjoy the game more. I've taken a few short breaks in playing (most recent run of the Gree event really burnt me out--the grey helix components being bound to character made things really frustrating. I have 13 on two of my characters, 10 on another, and 22 on a fourth, and by the second week, I just couldn't handle running the heroic more to get the parts I needed to get the weapons I wanted. Managed to get one lightsaber and I guess I'll have to be content with that), but I just got my fifth level 50 this weekend and I'm looking forward to enjoying this game for years to come.
On a side note, I'm a strange person: Even though I do have the five 50s, I still love doing all the side missions on planets and listening to the conversations. It's all just so fun. Give me voiced leveling quests over boring dailies any time. I've also yet to complete an operation: I've done most of Karagga's palace, but couldn't beat the Hutt himself, and haven't gotten a group together again. I'm looking forward to stretching myself and trying to get some better gear soon.
TL;DR: While I haven't been here from day one, I've been here as a subscriber for a year, and I love this game. I'm nervous about 2.0, but I plan on staying around as long as the game exists.