I avoid TIG welded aluminum frame. When I started cycling during Covid, I had a hand-me-down TIG'ed aluminum bike and the ride was horrendously bad. Which I realized when I switched to a steel Lemond bike. Later on I bought another TIG welded aluminum bike to harvest the groupset and wheels, and likewise the ride was horribly stiff on this bike. I couldn't wait to strip the parts off and throw the frame in the recycling bin. So no more pre-hydroformed TIG welded aluminum frames for me.
The other thing I dislike, is threadless stems. I insist on quill stems. I actually have two carbon bikes with quill stems. Carbon OK. Threadless not OK.