I played EQ1 for 8-8.5 ish years, it was very addicting to play. Now days it can be considered out dated graphics but the newer expansions always have better graphics over time. Theres a total of 18 or so total expansions for the game.
In general when I started playing EQ1 it was hard to level and now its much easier. A friend of mine who layed EQ1 with me played EQ2 and was maxed level and the majority of the quests done within 2.5 weeks. He had other friends start up when he did, who played with him to bust out the quests in getting them done.
If your looking to do EVERY expansion and so/so graphics play EQ1. But if your wanting better graphics and a stopping point in a few months play EQ2. I NEVER was high end on EQ1 for playing that long. How ever for not playing in about a year my character is still on the top 100 leader board of the server.