Well I enjoy both ROM and Strangerville. I'm still using them, both.
First ROM...because I like making spellcasters. They are over-powered but I think it's fun to be able to do housework and copy things and make plants spring out of the ground, a bunch of the spells are fun just to use in daily play.. especially if you like to make things easier for your household or make things harder for others.
As for Strangerville. I mostly never play with the storyline that comes with it. I love the world itself it's.. strange. I like seeing the military there almost like its occupied for whatever reason you might decide to play it that way. I enjoy playing possessed sims also. They have certain benefits like all their needs fill after their possessed state... so basically your sim never has to sleep. I can use it in multiple scenerios and have. I like offering the fruit to other sims too.. lol. Pass on the wealth!
So just saying if you like craziness you can get it with both packs eventually. Especially if you actively play your sims.
I think as a legacy player you should think about getting University also. I've personally never tried to send multiple sims to college at once though and I understand that can be hard to do, but it adds to normal and somewhat realistic play for that period of life. I like things like servo more in the long run but am still now and then sending someone to Uni. I really like that you can go from home also and that you aren't locked into any particular place until they are done.