When wanting to use a sinking line... when fishing stillwaters for trout...do you prefer a sink tip or a full sinking line?...and why.

Since in this situation....say from a pontoon or float tube you are likely retrieving almost all of the line in....pickup is not a problem IMHO...so the angles of the line...depth you can maintain for the fly....etc. .... become an issue....

What do you think matters?